Home / 13,724.88-18,937.71-8,689.92

Finding the Fourth Proportional to 13,724.88, 18,937.71 and 8,689.92

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Solution

The fourth proportional to 13,724.88, 18,937.71 and 8,689.92 is: 11,990.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.88 : 18,937.71 = 8,689.92 : x
  2. Step 2: Convert to fraction form
    13,724.88/18,937.71 = 8,689.92/x
  3. Step 3: Cross multiply
    13,724.88x = 18,937.71 × 8,689.92
  4. Step 4: Simplify right side
    13,724.88x = 164,567,184.88
  5. Step 5: Solve for x
    x = 164,567,184.88/13,724.88
  6. Step 6: Final answer
    x = 11,990.43

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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.