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Finding the Fourth Proportional to 7,863.12, 10,851 and 4,505.76

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Solution

The fourth proportional to 7,863.12, 10,851 and 4,505.76 is: 6,217.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,863.12 : 10,851 = 4,505.76 : x
  2. Step 2: Convert to fraction form
    7,863.12/10,851 = 4,505.76/x
  3. Step 3: Cross multiply
    7,863.12x = 10,851 × 4,505.76
  4. Step 4: Simplify right side
    7,863.12x = 48,892,001.76
  5. Step 5: Solve for x
    x = 48,892,001.76/7,863.12
  6. Step 6: Final answer
    x = 6,217.89

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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.