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Finding the Fourth Proportional to 43,491.31, 65,240.95 and 13,505.72

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Solution

The fourth proportional to 43,491.31, 65,240.95 and 13,505.72 is: 20,259.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,491.31 : 65,240.95 = 13,505.72 : x
  2. Step 2: Convert to fraction form
    43,491.31/65,240.95 = 13,505.72/x
  3. Step 3: Cross multiply
    43,491.31x = 65,240.95 × 13,505.72
  4. Step 4: Simplify right side
    43,491.31x = 881,126,003.23
  5. Step 5: Solve for x
    x = 881,126,003.23/43,491.31
  6. Step 6: Final answer
    x = 20,259.82

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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.