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Finding the Fourth Proportional to 7,711.80, 10,639.44 and 5,060.68

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Solution

The fourth proportional to 7,711.80, 10,639.44 and 5,060.68 is: 6,981.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,711.80 : 10,639.44 = 5,060.68 : x
  2. Step 2: Convert to fraction form
    7,711.80/10,639.44 = 5,060.68/x
  3. Step 3: Cross multiply
    7,711.80x = 10,639.44 × 5,060.68
  4. Step 4: Simplify right side
    7,711.80x = 53,842,801.22
  5. Step 5: Solve for x
    x = 53,842,801.22/7,711.80
  6. Step 6: Final answer
    x = 6,981.87

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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.