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Finding the Fourth Proportional to 28,172.97, 38,837.28 and 21,446.88

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Solution

The fourth proportional to 28,172.97, 38,837.28 and 21,446.88 is: 29,565.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.97 : 38,837.28 = 21,446.88 : x
  2. Step 2: Convert to fraction form
    28,172.97/38,837.28 = 21,446.88/x
  3. Step 3: Cross multiply
    28,172.97x = 38,837.28 × 21,446.88
  4. Step 4: Simplify right side
    28,172.97x = 832,938,483.69
  5. Step 5: Solve for x
    x = 832,938,483.69/28,172.97
  6. Step 6: Final answer
    x = 29,565.16

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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.