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Finding the Fourth Proportional to 7,761.91, 10,711.42 and 4,225.11

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Solution

The fourth proportional to 7,761.91, 10,711.42 and 4,225.11 is: 5,830.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,761.91 : 10,711.42 = 4,225.11 : x
  2. Step 2: Convert to fraction form
    7,761.91/10,711.42 = 4,225.11/x
  3. Step 3: Cross multiply
    7,761.91x = 10,711.42 × 4,225.11
  4. Step 4: Simplify right side
    7,761.91x = 45,256,917.19
  5. Step 5: Solve for x
    x = 45,256,917.19/7,761.91
  6. Step 6: Final answer
    x = 5,830.64

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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.