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Finding the Fourth Proportional to 28,118, 38,802.89 and 15,542.75

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Solution

The fourth proportional to 28,118, 38,802.89 and 15,542.75 is: 21,449.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,118 : 38,802.89 = 15,542.75 : x
  2. Step 2: Convert to fraction form
    28,118/38,802.89 = 15,542.75/x
  3. Step 3: Cross multiply
    28,118x = 38,802.89 × 15,542.75
  4. Step 4: Simplify right side
    28,118x = 603,103,618.55
  5. Step 5: Solve for x
    x = 603,103,618.55/28,118
  6. Step 6: Final answer
    x = 21,449.02

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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.