Home / 11,217.72-15,479.20-6,436.38

Finding the Fourth Proportional to 11,217.72, 15,479.20 and 6,436.38

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Solution

The fourth proportional to 11,217.72, 15,479.20 and 6,436.38 is: 8,881.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,217.72 : 15,479.20 = 6,436.38 : x
  2. Step 2: Convert to fraction form
    11,217.72/15,479.20 = 6,436.38/x
  3. Step 3: Cross multiply
    11,217.72x = 15,479.20 × 6,436.38
  4. Step 4: Simplify right side
    11,217.72x = 99,630,013.30
  5. Step 5: Solve for x
    x = 99,630,013.30/11,217.72
  6. Step 6: Final answer
    x = 8,881.49

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Half scale
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Double scale
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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.