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Finding the Fourth Proportional to 6,139.76, 8,472.92 and 3,345.24

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Solution

The fourth proportional to 6,139.76, 8,472.92 and 3,345.24 is: 4,616.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,139.76 : 8,472.92 = 3,345.24 : x
  2. Step 2: Convert to fraction form
    6,139.76/8,472.92 = 3,345.24/x
  3. Step 3: Cross multiply
    6,139.76x = 8,472.92 × 3,345.24
  4. Step 4: Simplify right side
    6,139.76x = 28,343,950.90
  5. Step 5: Solve for x
    x = 28,343,950.90/6,139.76
  6. Step 6: Final answer
    x = 4,616.46

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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.