Home / 20,219,612.20-30,329,418.30-12,661,340.20

Finding the Fourth Proportional to 20,219,612.20, 30,329,418.30 and 12,661,340.20

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Solution

The fourth proportional to 20,219,612.20, 30,329,418.30 and 12,661,340.20 is: 18,992,010.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219,612.20 : 30,329,418.30 = 12,661,340.20 : x
  2. Step 2: Convert to fraction form
    20,219,612.20/30,329,418.30 = 12,661,340.20/x
  3. Step 3: Cross multiply
    20,219,612.20x = 30,329,418.30 × 12,661,340.20
  4. Step 4: Simplify right side
    20,219,612.20x = 384,011,083,164,405.62
  5. Step 5: Solve for x
    x = 384,011,083,164,405.62/20,219,612.20
  6. Step 6: Final answer
    x = 18,992,010.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.