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Finding the Fourth Proportional to 6,139.56, 8,472.54 and 3,345

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Solution

The fourth proportional to 6,139.56, 8,472.54 and 3,345 is: 4,616.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,139.56 : 8,472.54 = 3,345 : x
  2. Step 2: Convert to fraction form
    6,139.56/8,472.54 = 3,345/x
  3. Step 3: Cross multiply
    6,139.56x = 8,472.54 × 3,345
  4. Step 4: Simplify right side
    6,139.56x = 28,340,646.30
  5. Step 5: Solve for x
    x = 28,340,646.30/6,139.56
  6. Step 6: Final answer
    x = 4,616.07

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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.