Home / 28,468.91-39,287.30-15,721.74

Finding the Fourth Proportional to 28,468.91, 39,287.30 and 15,721.74

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Solution

The fourth proportional to 28,468.91, 39,287.30 and 15,721.74 is: 21,696.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,468.91 : 39,287.30 = 15,721.74 : x
  2. Step 2: Convert to fraction form
    28,468.91/39,287.30 = 15,721.74/x
  3. Step 3: Cross multiply
    28,468.91x = 39,287.30 × 15,721.74
  4. Step 4: Simplify right side
    28,468.91x = 617,664,755.21
  5. Step 5: Solve for x
    x = 617,664,755.21/28,468.91
  6. Step 6: Final answer
    x = 21,696.11

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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.