Home / 21,591.13-32,390.39-9,905.35

Finding the Fourth Proportional to 21,591.13, 32,390.39 and 9,905.35

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Solution

The fourth proportional to 21,591.13, 32,390.39 and 9,905.35 is: 14,859.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,591.13 : 32,390.39 = 9,905.35 : x
  2. Step 2: Convert to fraction form
    21,591.13/32,390.39 = 9,905.35/x
  3. Step 3: Cross multiply
    21,591.13x = 32,390.39 × 9,905.35
  4. Step 4: Simplify right side
    21,591.13x = 320,838,149.59
  5. Step 5: Solve for x
    x = 320,838,149.59/21,591.13
  6. Step 6: Final answer
    x = 14,859.72

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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.