Home / 9,986.52-13,779-6,449.12

Finding the Fourth Proportional to 9,986.52, 13,779 and 6,449.12

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Solution

The fourth proportional to 9,986.52, 13,779 and 6,449.12 is: 8,898.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,986.52 : 13,779 = 6,449.12 : x
  2. Step 2: Convert to fraction form
    9,986.52/13,779 = 6,449.12/x
  3. Step 3: Cross multiply
    9,986.52x = 13,779 × 6,449.12
  4. Step 4: Simplify right side
    9,986.52x = 88,862,424.48
  5. Step 5: Solve for x
    x = 88,862,424.48/9,986.52
  6. Step 6: Final answer
    x = 8,898.24

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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.