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Finding the Fourth Proportional to 28,009.98, 38,654.61 and 15,264

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Solution

The fourth proportional to 28,009.98, 38,654.61 and 15,264 is: 21,064.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.98 : 38,654.61 = 15,264 : x
  2. Step 2: Convert to fraction form
    28,009.98/38,654.61 = 15,264/x
  3. Step 3: Cross multiply
    28,009.98x = 38,654.61 × 15,264
  4. Step 4: Simplify right side
    28,009.98x = 590,023,967.04
  5. Step 5: Solve for x
    x = 590,023,967.04/28,009.98
  6. Step 6: Final answer
    x = 21,064.78

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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.