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Finding the Fourth Proportional to 43,487.40, 65,239.31 and 13,897.29

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Solution

The fourth proportional to 43,487.40, 65,239.31 and 13,897.29 is: 20,848.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,487.40 : 65,239.31 = 13,897.29 : x
  2. Step 2: Convert to fraction form
    43,487.40/65,239.31 = 13,897.29/x
  3. Step 3: Cross multiply
    43,487.40x = 65,239.31 × 13,897.29
  4. Step 4: Simplify right side
    43,487.40x = 906,649,610.47
  5. Step 5: Solve for x
    x = 906,649,610.47/43,487.40
  6. Step 6: Final answer
    x = 20,848.56

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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.