Home / 21,427.52-32,148.30-13,520.90

Finding the Fourth Proportional to 21,427.52, 32,148.30 and 13,520.90

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Solution

The fourth proportional to 21,427.52, 32,148.30 and 13,520.90 is: 20,285.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,427.52 : 32,148.30 = 13,520.90 : x
  2. Step 2: Convert to fraction form
    21,427.52/32,148.30 = 13,520.90/x
  3. Step 3: Cross multiply
    21,427.52x = 32,148.30 × 13,520.90
  4. Step 4: Simplify right side
    21,427.52x = 434,673,949.47
  5. Step 5: Solve for x
    x = 434,673,949.47/21,427.52
  6. Step 6: Final answer
    x = 20,285.78

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1.5x scale

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.