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Finding the Fourth Proportional to 40,753.60, 61,131.84 and 13,048

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Solution

The fourth proportional to 40,753.60, 61,131.84 and 13,048 is: 19,572.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,753.60 : 61,131.84 = 13,048 : x
  2. Step 2: Convert to fraction form
    40,753.60/61,131.84 = 13,048/x
  3. Step 3: Cross multiply
    40,753.60x = 61,131.84 × 13,048
  4. Step 4: Simplify right side
    40,753.60x = 797,648,248.32
  5. Step 5: Solve for x
    x = 797,648,248.32/40,753.60
  6. Step 6: Final answer
    x = 19,572.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.