Home / 20,388.29-28,134.40-11,314.14

Finding the Fourth Proportional to 20,388.29, 28,134.40 and 11,314.14

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Solution

The fourth proportional to 20,388.29, 28,134.40 and 11,314.14 is: 15,612.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.29 : 28,134.40 = 11,314.14 : x
  2. Step 2: Convert to fraction form
    20,388.29/28,134.40 = 11,314.14/x
  3. Step 3: Cross multiply
    20,388.29x = 28,134.40 × 11,314.14
  4. Step 4: Simplify right side
    20,388.29x = 318,316,641.57
  5. Step 5: Solve for x
    x = 318,316,641.57/20,388.29
  6. Step 6: Final answer
    x = 15,612.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.