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Finding the Fourth Proportional to 7,871.80, 10,862.67 and 4,514.46

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Solution

The fourth proportional to 7,871.80, 10,862.67 and 4,514.46 is: 6,229.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.80 : 10,862.67 = 4,514.46 : x
  2. Step 2: Convert to fraction form
    7,871.80/10,862.67 = 4,514.46/x
  3. Step 3: Cross multiply
    7,871.80x = 10,862.67 × 4,514.46
  4. Step 4: Simplify right side
    7,871.80x = 49,039,089.21
  5. Step 5: Solve for x
    x = 49,039,089.21/7,871.80
  6. Step 6: Final answer
    x = 6,229.72

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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.