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Finding the Fourth Proportional to 8,847.70, 12,211.17 and 5,312.86

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Solution

The fourth proportional to 8,847.70, 12,211.17 and 5,312.86 is: 7,332.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,847.70 : 12,211.17 = 5,312.86 : x
  2. Step 2: Convert to fraction form
    8,847.70/12,211.17 = 5,312.86/x
  3. Step 3: Cross multiply
    8,847.70x = 12,211.17 × 5,312.86
  4. Step 4: Simplify right side
    8,847.70x = 64,876,236.65
  5. Step 5: Solve for x
    x = 64,876,236.65/8,847.70
  6. Step 6: Final answer
    x = 7,332.55

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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.