Home / 20,585.66-28,408.54-11,512.04

Finding the Fourth Proportional to 20,585.66, 28,408.54 and 11,512.04

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Solution

The fourth proportional to 20,585.66, 28,408.54 and 11,512.04 is: 15,886.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.66 : 28,408.54 = 11,512.04 : x
  2. Step 2: Convert to fraction form
    20,585.66/28,408.54 = 11,512.04/x
  3. Step 3: Cross multiply
    20,585.66x = 28,408.54 × 11,512.04
  4. Step 4: Simplify right side
    20,585.66x = 327,040,248.82
  5. Step 5: Solve for x
    x = 327,040,248.82/20,585.66
  6. Step 6: Final answer
    x = 15,886.80

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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.