Home / 15,432.20-21,296.40-8,358.64

Finding the Fourth Proportional to 15,432.20, 21,296.40 and 8,358.64

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Solution

The fourth proportional to 15,432.20, 21,296.40 and 8,358.64 is: 11,534.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,432.20 : 21,296.40 = 8,358.64 : x
  2. Step 2: Convert to fraction form
    15,432.20/21,296.40 = 8,358.64/x
  3. Step 3: Cross multiply
    15,432.20x = 21,296.40 × 8,358.64
  4. Step 4: Simplify right side
    15,432.20x = 178,008,940.90
  5. Step 5: Solve for x
    x = 178,008,940.90/15,432.20
  6. Step 6: Final answer
    x = 11,534.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.