Home / 9,981.70-13,766.97-6,445.78

Finding the Fourth Proportional to 9,981.70, 13,766.97 and 6,445.78

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Solution

The fourth proportional to 9,981.70, 13,766.97 and 6,445.78 is: 8,890.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,981.70 : 13,766.97 = 6,445.78 : x
  2. Step 2: Convert to fraction form
    9,981.70/13,766.97 = 6,445.78/x
  3. Step 3: Cross multiply
    9,981.70x = 13,766.97 × 6,445.78
  4. Step 4: Simplify right side
    9,981.70x = 88,738,859.89
  5. Step 5: Solve for x
    x = 88,738,859.89/9,981.70
  6. Step 6: Final answer
    x = 8,890.15

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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.