Home / 12,278.20-18,419.46-3,955.72

Finding the Fourth Proportional to 12,278.20, 18,419.46 and 3,955.72

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Solution

The fourth proportional to 12,278.20, 18,419.46 and 3,955.72 is: 5,934.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.20 : 18,419.46 = 3,955.72 : x
  2. Step 2: Convert to fraction form
    12,278.20/18,419.46 = 3,955.72/x
  3. Step 3: Cross multiply
    12,278.20x = 18,419.46 × 3,955.72
  4. Step 4: Simplify right side
    12,278.20x = 72,862,226.31
  5. Step 5: Solve for x
    x = 72,862,226.31/12,278.20
  6. Step 6: Final answer
    x = 5,934.28

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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.