Home / 10,215.28-15,376.84-8,711.92

Finding the Fourth Proportional to 10,215.28, 15,376.84 and 8,711.92

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Solution

The fourth proportional to 10,215.28, 15,376.84 and 8,711.92 is: 13,113.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215.28 : 15,376.84 = 8,711.92 : x
  2. Step 2: Convert to fraction form
    10,215.28/15,376.84 = 8,711.92/x
  3. Step 3: Cross multiply
    10,215.28x = 15,376.84 × 8,711.92
  4. Step 4: Simplify right side
    10,215.28x = 133,961,799.93
  5. Step 5: Solve for x
    x = 133,961,799.93/10,215.28
  6. Step 6: Final answer
    x = 13,113.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.