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Finding the Fourth Proportional to 28,437.74, 39,244.48 and 15,691.48

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Solution

The fourth proportional to 28,437.74, 39,244.48 and 15,691.48 is: 21,654.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,437.74 : 39,244.48 = 15,691.48 : x
  2. Step 2: Convert to fraction form
    28,437.74/39,244.48 = 15,691.48/x
  3. Step 3: Cross multiply
    28,437.74x = 39,244.48 × 15,691.48
  4. Step 4: Simplify right side
    28,437.74x = 615,803,973.03
  5. Step 5: Solve for x
    x = 615,803,973.03/28,437.74
  6. Step 6: Final answer
    x = 21,654.46

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.