Home / 21,909.70-32,852.40-8,747.20

Finding the Fourth Proportional to 21,909.70, 32,852.40 and 8,747.20

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Solution

The fourth proportional to 21,909.70, 32,852.40 and 8,747.20 is: 13,115.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.70 : 32,852.40 = 8,747.20 : x
  2. Step 2: Convert to fraction form
    21,909.70/32,852.40 = 8,747.20/x
  3. Step 3: Cross multiply
    21,909.70x = 32,852.40 × 8,747.20
  4. Step 4: Simplify right side
    21,909.70x = 287,366,513.28
  5. Step 5: Solve for x
    x = 287,366,513.28/21,909.70
  6. Step 6: Final answer
    x = 13,115.95

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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.