Home / 21,578.40-32,375.30-8,440.20

Finding the Fourth Proportional to 21,578.40, 32,375.30 and 8,440.20

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Solution

The fourth proportional to 21,578.40, 32,375.30 and 8,440.20 is: 12,663.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,578.40 : 32,375.30 = 8,440.20 : x
  2. Step 2: Convert to fraction form
    21,578.40/32,375.30 = 8,440.20/x
  3. Step 3: Cross multiply
    21,578.40x = 32,375.30 × 8,440.20
  4. Step 4: Simplify right side
    21,578.40x = 273,253,964.86
  5. Step 5: Solve for x
    x = 273,253,964.86/21,578.40
  6. Step 6: Final answer
    x = 12,663.31

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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.