Home / 20,494.20-30,770.10-12,718.20

Finding the Fourth Proportional to 20,494.20, 30,770.10 and 12,718.20

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Solution

The fourth proportional to 20,494.20, 30,770.10 and 12,718.20 is: 19,095.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,494.20 : 30,770.10 = 12,718.20 : x
  2. Step 2: Convert to fraction form
    20,494.20/30,770.10 = 12,718.20/x
  3. Step 3: Cross multiply
    20,494.20x = 30,770.10 × 12,718.20
  4. Step 4: Simplify right side
    20,494.20x = 391,340,285.82
  5. Step 5: Solve for x
    x = 391,340,285.82/20,494.20
  6. Step 6: Final answer
    x = 19,095.17

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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.