Home / 8,785.72-12,122.22-6,423.76

Finding the Fourth Proportional to 8,785.72, 12,122.22 and 6,423.76

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Solution

The fourth proportional to 8,785.72, 12,122.22 and 6,423.76 is: 8,863.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,785.72 : 12,122.22 = 6,423.76 : x
  2. Step 2: Convert to fraction form
    8,785.72/12,122.22 = 6,423.76/x
  3. Step 3: Cross multiply
    8,785.72x = 12,122.22 × 6,423.76
  4. Step 4: Simplify right side
    8,785.72x = 77,870,231.95
  5. Step 5: Solve for x
    x = 77,870,231.95/8,785.72
  6. Step 6: Final answer
    x = 8,863.27

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Double scale
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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.