Home / 4,257.12-6,387.30-1,947

Finding the Fourth Proportional to 4,257.12, 6,387.30 and 1,947

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Solution

The fourth proportional to 4,257.12, 6,387.30 and 1,947 is: 2,921.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,257.12 : 6,387.30 = 1,947 : x
  2. Step 2: Convert to fraction form
    4,257.12/6,387.30 = 1,947/x
  3. Step 3: Cross multiply
    4,257.12x = 6,387.30 × 1,947
  4. Step 4: Simplify right side
    4,257.12x = 12,436,073.10
  5. Step 5: Solve for x
    x = 12,436,073.10/4,257.12
  6. Step 6: Final answer
    x = 2,921.24

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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.