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Finding the Fourth Proportional to 6,139.05, 8,472.14 and 3,486.71

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Solution

The fourth proportional to 6,139.05, 8,472.14 and 3,486.71 is: 4,811.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,139.05 : 8,472.14 = 3,486.71 : x
  2. Step 2: Convert to fraction form
    6,139.05/8,472.14 = 3,486.71/x
  3. Step 3: Cross multiply
    6,139.05x = 8,472.14 × 3,486.71
  4. Step 4: Simplify right side
    6,139.05x = 29,539,835.47
  5. Step 5: Solve for x
    x = 29,539,835.47/6,139.05
  6. Step 6: Final answer
    x = 4,811.79

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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.