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Finding the Fourth Proportional to 7,889.20, 10,890.84 and 5,543.68

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Solution

The fourth proportional to 7,889.20, 10,890.84 and 5,543.68 is: 7,652.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,889.20 : 10,890.84 = 5,543.68 : x
  2. Step 2: Convert to fraction form
    7,889.20/10,890.84 = 5,543.68/x
  3. Step 3: Cross multiply
    7,889.20x = 10,890.84 × 5,543.68
  4. Step 4: Simplify right side
    7,889.20x = 60,375,331.89
  5. Step 5: Solve for x
    x = 60,375,331.89/7,889.20
  6. Step 6: Final answer
    x = 7,652.91

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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.