Home / 6,478.38-8,934.75-3,990.06

Finding the Fourth Proportional to 6,478.38, 8,934.75 and 3,990.06

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Solution

The fourth proportional to 6,478.38, 8,934.75 and 3,990.06 is: 5,502.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,478.38 : 8,934.75 = 3,990.06 : x
  2. Step 2: Convert to fraction form
    6,478.38/8,934.75 = 3,990.06/x
  3. Step 3: Cross multiply
    6,478.38x = 8,934.75 × 3,990.06
  4. Step 4: Simplify right side
    6,478.38x = 35,650,188.59
  5. Step 5: Solve for x
    x = 35,650,188.59/6,478.38
  6. Step 6: Final answer
    x = 5,502.95

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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.