Home / 20,344.60-28,073.09-11,391.40

Finding the Fourth Proportional to 20,344.60, 28,073.09 and 11,391.40

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Solution

The fourth proportional to 20,344.60, 28,073.09 and 11,391.40 is: 15,718.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,344.60 : 28,073.09 = 11,391.40 : x
  2. Step 2: Convert to fraction form
    20,344.60/28,073.09 = 11,391.40/x
  3. Step 3: Cross multiply
    20,344.60x = 28,073.09 × 11,391.40
  4. Step 4: Simplify right side
    20,344.60x = 319,791,797.43
  5. Step 5: Solve for x
    x = 319,791,797.43/20,344.60
  6. Step 6: Final answer
    x = 15,718.76

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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.