Home / 20,540.64-28,344.24-11,585.76

Finding the Fourth Proportional to 20,540.64, 28,344.24 and 11,585.76

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Solution

The fourth proportional to 20,540.64, 28,344.24 and 11,585.76 is: 15,987.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.64 : 28,344.24 = 11,585.76 : x
  2. Step 2: Convert to fraction form
    20,540.64/28,344.24 = 11,585.76/x
  3. Step 3: Cross multiply
    20,540.64x = 28,344.24 × 11,585.76
  4. Step 4: Simplify right side
    20,540.64x = 328,389,562.02
  5. Step 5: Solve for x
    x = 328,389,562.02/20,540.64
  6. Step 6: Final answer
    x = 15,987.31

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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.