Home / 11,320.28-15,611.10-8,798.78

Finding the Fourth Proportional to 11,320.28, 15,611.10 and 8,798.78

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Solution

The fourth proportional to 11,320.28, 15,611.10 and 8,798.78 is: 12,133.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,320.28 : 15,611.10 = 8,798.78 : x
  2. Step 2: Convert to fraction form
    11,320.28/15,611.10 = 8,798.78/x
  3. Step 3: Cross multiply
    11,320.28x = 15,611.10 × 8,798.78
  4. Step 4: Simplify right side
    11,320.28x = 137,358,634.46
  5. Step 5: Solve for x
    x = 137,358,634.46/11,320.28
  6. Step 6: Final answer
    x = 12,133.85

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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.