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Finding the Fourth Proportional to 28,244.84, 38,978.78 and 15,498.14

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Solution

The fourth proportional to 28,244.84, 38,978.78 and 15,498.14 is: 21,387.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,244.84 : 38,978.78 = 15,498.14 : x
  2. Step 2: Convert to fraction form
    28,244.84/38,978.78 = 15,498.14/x
  3. Step 3: Cross multiply
    28,244.84x = 38,978.78 × 15,498.14
  4. Step 4: Simplify right side
    28,244.84x = 604,098,317.08
  5. Step 5: Solve for x
    x = 604,098,317.08/28,244.84
  6. Step 6: Final answer
    x = 21,387.92

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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.