Home / 6,278.60-9,418.80-2,117.90

Finding the Fourth Proportional to 6,278.60, 9,418.80 and 2,117.90

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Solution

The fourth proportional to 6,278.60, 9,418.80 and 2,117.90 is: 3,177.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,278.60 : 9,418.80 = 2,117.90 : x
  2. Step 2: Convert to fraction form
    6,278.60/9,418.80 = 2,117.90/x
  3. Step 3: Cross multiply
    6,278.60x = 9,418.80 × 2,117.90
  4. Step 4: Simplify right side
    6,278.60x = 19,948,076.52
  5. Step 5: Solve for x
    x = 19,948,076.52/6,278.60
  6. Step 6: Final answer
    x = 3,177.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.