Home / 20,143.10-30,214.65-12,356.30

Finding the Fourth Proportional to 20,143.10, 30,214.65 and 12,356.30

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Solution

The fourth proportional to 20,143.10, 30,214.65 and 12,356.30 is: 18,534.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.10 : 30,214.65 = 12,356.30 : x
  2. Step 2: Convert to fraction form
    20,143.10/30,214.65 = 12,356.30/x
  3. Step 3: Cross multiply
    20,143.10x = 30,214.65 × 12,356.30
  4. Step 4: Simplify right side
    20,143.10x = 373,341,279.80
  5. Step 5: Solve for x
    x = 373,341,279.80/20,143.10
  6. Step 6: Final answer
    x = 18,534.45

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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.