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Finding the Fourth Proportional to 6,139.80, 8,472.87 and 3,345.30

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Solution

The fourth proportional to 6,139.80, 8,472.87 and 3,345.30 is: 4,616.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,139.80 : 8,472.87 = 3,345.30 : x
  2. Step 2: Convert to fraction form
    6,139.80/8,472.87 = 3,345.30/x
  3. Step 3: Cross multiply
    6,139.80x = 8,472.87 × 3,345.30
  4. Step 4: Simplify right side
    6,139.80x = 28,344,292.01
  5. Step 5: Solve for x
    x = 28,344,292.01/6,139.80
  6. Step 6: Final answer
    x = 4,616.48

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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.