Home / 15,505.59-21,397.86-9,216.75

Finding the Fourth Proportional to 15,505.59, 21,397.86 and 9,216.75

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Solution

The fourth proportional to 15,505.59, 21,397.86 and 9,216.75 is: 12,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.59 : 21,397.86 = 9,216.75 : x
  2. Step 2: Convert to fraction form
    15,505.59/21,397.86 = 9,216.75/x
  3. Step 3: Cross multiply
    15,505.59x = 21,397.86 × 9,216.75
  4. Step 4: Simplify right side
    15,505.59x = 197,218,726.16
  5. Step 5: Solve for x
    x = 197,218,726.16/15,505.59
  6. Step 6: Final answer
    x = 12,719.20

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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.