Home / 13,723.89-18,937.14-8,679.21

Finding the Fourth Proportional to 13,723.89, 18,937.14 and 8,679.21

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Solution

The fourth proportional to 13,723.89, 18,937.14 and 8,679.21 is: 11,976.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,723.89 : 18,937.14 = 8,679.21 : x
  2. Step 2: Convert to fraction form
    13,723.89/18,937.14 = 8,679.21/x
  3. Step 3: Cross multiply
    13,723.89x = 18,937.14 × 8,679.21
  4. Step 4: Simplify right side
    13,723.89x = 164,359,414.86
  5. Step 5: Solve for x
    x = 164,359,414.86/13,723.89
  6. Step 6: Final answer
    x = 11,976.15

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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.