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Finding the Fourth Proportional to 6,139.71, 8,472.48 and 3,486.75

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Solution

The fourth proportional to 6,139.71, 8,472.48 and 3,486.75 is: 4,811.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,139.71 : 8,472.48 = 3,486.75 : x
  2. Step 2: Convert to fraction form
    6,139.71/8,472.48 = 3,486.75/x
  3. Step 3: Cross multiply
    6,139.71x = 8,472.48 × 3,486.75
  4. Step 4: Simplify right side
    6,139.71x = 29,541,419.64
  5. Step 5: Solve for x
    x = 29,541,419.64/6,139.71
  6. Step 6: Final answer
    x = 4,811.53

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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.