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Finding the Fourth Proportional to 6,871.70, 9,478.41 and 5,453.13

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Solution

The fourth proportional to 6,871.70, 9,478.41 and 5,453.13 is: 7,521.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,871.70 : 9,478.41 = 5,453.13 : x
  2. Step 2: Convert to fraction form
    6,871.70/9,478.41 = 5,453.13/x
  3. Step 3: Cross multiply
    6,871.70x = 9,478.41 × 5,453.13
  4. Step 4: Simplify right side
    6,871.70x = 51,687,001.92
  5. Step 5: Solve for x
    x = 51,687,001.92/6,871.70
  6. Step 6: Final answer
    x = 7,521.73

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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.