Home / 20,470.71-28,250.13-11,518.53

Finding the Fourth Proportional to 20,470.71, 28,250.13 and 11,518.53

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Solution

The fourth proportional to 20,470.71, 28,250.13 and 11,518.53 is: 15,895.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.71 : 28,250.13 = 11,518.53 : x
  2. Step 2: Convert to fraction form
    20,470.71/28,250.13 = 11,518.53/x
  3. Step 3: Cross multiply
    20,470.71x = 28,250.13 × 11,518.53
  4. Step 4: Simplify right side
    20,470.71x = 325,399,809.98
  5. Step 5: Solve for x
    x = 325,399,809.98/20,470.71
  6. Step 6: Final answer
    x = 15,895.88

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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.