Home / 12,381.12-18,572.31-3,616.74

Finding the Fourth Proportional to 12,381.12, 18,572.31 and 3,616.74

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Solution

The fourth proportional to 12,381.12, 18,572.31 and 3,616.74 is: 5,425.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.12 : 18,572.31 = 3,616.74 : x
  2. Step 2: Convert to fraction form
    12,381.12/18,572.31 = 3,616.74/x
  3. Step 3: Cross multiply
    12,381.12x = 18,572.31 × 3,616.74
  4. Step 4: Simplify right side
    12,381.12x = 67,171,216.47
  5. Step 5: Solve for x
    x = 67,171,216.47/12,381.12
  6. Step 6: Final answer
    x = 5,425.29

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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.