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Finding the Fourth Proportional to 11,520.28, 15,897.78 and 6,484.49

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Solution

The fourth proportional to 11,520.28, 15,897.78 and 6,484.49 is: 8,948.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,520.28 : 15,897.78 = 6,484.49 : x
  2. Step 2: Convert to fraction form
    11,520.28/15,897.78 = 6,484.49/x
  3. Step 3: Cross multiply
    11,520.28x = 15,897.78 × 6,484.49
  4. Step 4: Simplify right side
    11,520.28x = 103,088,995.43
  5. Step 5: Solve for x
    x = 103,088,995.43/11,520.28
  6. Step 6: Final answer
    x = 8,948.48

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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.