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Finding the Fourth Proportional to 7,919.16, 10,915.87 and 6,237.90

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Solution

The fourth proportional to 7,919.16, 10,915.87 and 6,237.90 is: 8,598.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.16 : 10,915.87 = 6,237.90 : x
  2. Step 2: Convert to fraction form
    7,919.16/10,915.87 = 6,237.90/x
  3. Step 3: Cross multiply
    7,919.16x = 10,915.87 × 6,237.90
  4. Step 4: Simplify right side
    7,919.16x = 68,092,105.47
  5. Step 5: Solve for x
    x = 68,092,105.47/7,919.16
  6. Step 6: Final answer
    x = 8,598.40

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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.