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Finding the Fourth Proportional to 7,013.80, 9,679.14 and 3,869.92

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Solution

The fourth proportional to 7,013.80, 9,679.14 and 3,869.92 is: 5,340.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,013.80 : 9,679.14 = 3,869.92 : x
  2. Step 2: Convert to fraction form
    7,013.80/9,679.14 = 3,869.92/x
  3. Step 3: Cross multiply
    7,013.80x = 9,679.14 × 3,869.92
  4. Step 4: Simplify right side
    7,013.80x = 37,457,497.47
  5. Step 5: Solve for x
    x = 37,457,497.47/7,013.80
  6. Step 6: Final answer
    x = 5,340.54

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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.