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Finding the Fourth Proportional to 7,781.90, 11,672.85 and 7,360.70

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Solution

The fourth proportional to 7,781.90, 11,672.85 and 7,360.70 is: 11,041.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.90 : 11,672.85 = 7,360.70 : x
  2. Step 2: Convert to fraction form
    7,781.90/11,672.85 = 7,360.70/x
  3. Step 3: Cross multiply
    7,781.90x = 11,672.85 × 7,360.70
  4. Step 4: Simplify right side
    7,781.90x = 85,920,347.00
  5. Step 5: Solve for x
    x = 85,920,347.00/7,781.90
  6. Step 6: Final answer
    x = 11,041.05

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.