Home / 8,442.20-12,644.10-5,331.80

Finding the Fourth Proportional to 8,442.20, 12,644.10 and 5,331.80

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Solution

The fourth proportional to 8,442.20, 12,644.10 and 5,331.80 is: 7,985.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,442.20 : 12,644.10 = 5,331.80 : x
  2. Step 2: Convert to fraction form
    8,442.20/12,644.10 = 5,331.80/x
  3. Step 3: Cross multiply
    8,442.20x = 12,644.10 × 5,331.80
  4. Step 4: Simplify right side
    8,442.20x = 67,415,812.38
  5. Step 5: Solve for x
    x = 67,415,812.38/8,442.20
  6. Step 6: Final answer
    x = 7,985.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.