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Finding the Fourth Proportional to 40,589.80, 60,890.76 and 14,289.90

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Solution

The fourth proportional to 40,589.80, 60,890.76 and 14,289.90 is: 21,436.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,589.80 : 60,890.76 = 14,289.90 : x
  2. Step 2: Convert to fraction form
    40,589.80/60,890.76 = 14,289.90/x
  3. Step 3: Cross multiply
    40,589.80x = 60,890.76 × 14,289.90
  4. Step 4: Simplify right side
    40,589.80x = 870,122,871.32
  5. Step 5: Solve for x
    x = 870,122,871.32/40,589.80
  6. Step 6: Final answer
    x = 21,436.98

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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.