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Finding the Fourth Proportional to 6,915.38, 9,543.12 and 3,771.50

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Solution

The fourth proportional to 6,915.38, 9,543.12 and 3,771.50 is: 5,204.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,915.38 : 9,543.12 = 3,771.50 : x
  2. Step 2: Convert to fraction form
    6,915.38/9,543.12 = 3,771.50/x
  3. Step 3: Cross multiply
    6,915.38x = 9,543.12 × 3,771.50
  4. Step 4: Simplify right side
    6,915.38x = 35,991,877.08
  5. Step 5: Solve for x
    x = 35,991,877.08/6,915.38
  6. Step 6: Final answer
    x = 5,204.61

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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.