Home / 9,789.25-13,520.38-6,447

Finding the Fourth Proportional to 9,789.25, 13,520.38 and 6,447

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Solution

The fourth proportional to 9,789.25, 13,520.38 and 6,447 is: 8,904.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,789.25 : 13,520.38 = 6,447 : x
  2. Step 2: Convert to fraction form
    9,789.25/13,520.38 = 6,447/x
  3. Step 3: Cross multiply
    9,789.25x = 13,520.38 × 6,447
  4. Step 4: Simplify right side
    9,789.25x = 87,165,889.86
  5. Step 5: Solve for x
    x = 87,165,889.86/9,789.25
  6. Step 6: Final answer
    x = 8,904.25

Related Problems

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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.