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Finding the Fourth Proportional to 65,591.40, 98,390.19 and 21,221.64

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Solution

The fourth proportional to 65,591.40, 98,390.19 and 21,221.64 is: 31,833.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,591.40 : 98,390.19 = 21,221.64 : x
  2. Step 2: Convert to fraction form
    65,591.40/98,390.19 = 21,221.64/x
  3. Step 3: Cross multiply
    65,591.40x = 98,390.19 × 21,221.64
  4. Step 4: Simplify right side
    65,591.40x = 2,088,001,191.71
  5. Step 5: Solve for x
    x = 2,088,001,191.71/65,591.40
  6. Step 6: Final answer
    x = 31,833.46

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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.