Home / 7,239.30-9,989.10-4,257.69

Finding the Fourth Proportional to 7,239.30, 9,989.10 and 4,257.69

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Solution

The fourth proportional to 7,239.30, 9,989.10 and 4,257.69 is: 5,874.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.30 : 9,989.10 = 4,257.69 : x
  2. Step 2: Convert to fraction form
    7,239.30/9,989.10 = 4,257.69/x
  3. Step 3: Cross multiply
    7,239.30x = 9,989.10 × 4,257.69
  4. Step 4: Simplify right side
    7,239.30x = 42,530,491.18
  5. Step 5: Solve for x
    x = 42,530,491.18/7,239.30
  6. Step 6: Final answer
    x = 5,874.95

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Half scale
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Double scale
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Similar ratio
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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.