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Finding the Fourth Proportional to 21,447.76, 29,599.56 and 12,374.76

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Solution

The fourth proportional to 21,447.76, 29,599.56 and 12,374.76 is: 17,078.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,447.76 : 29,599.56 = 12,374.76 : x
  2. Step 2: Convert to fraction form
    21,447.76/29,599.56 = 12,374.76/x
  3. Step 3: Cross multiply
    21,447.76x = 29,599.56 × 12,374.76
  4. Step 4: Simplify right side
    21,447.76x = 366,287,451.11
  5. Step 5: Solve for x
    x = 366,287,451.11/21,447.76
  6. Step 6: Final answer
    x = 17,078.12

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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.