Home / 21,060.76-31,591.18-5,478.36

Finding the Fourth Proportional to 21,060.76, 31,591.18 and 5,478.36

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Solution

The fourth proportional to 21,060.76, 31,591.18 and 5,478.36 is: 8,217.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,060.76 : 31,591.18 = 5,478.36 : x
  2. Step 2: Convert to fraction form
    21,060.76/31,591.18 = 5,478.36/x
  3. Step 3: Cross multiply
    21,060.76x = 31,591.18 × 5,478.36
  4. Step 4: Simplify right side
    21,060.76x = 173,067,856.86
  5. Step 5: Solve for x
    x = 173,067,856.86/21,060.76
  6. Step 6: Final answer
    x = 8,217.55

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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.