Home / 20,591.19-28,417.28-11,638.75

Finding the Fourth Proportional to 20,591.19, 28,417.28 and 11,638.75

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Solution

The fourth proportional to 20,591.19, 28,417.28 and 11,638.75 is: 16,062.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,591.19 : 28,417.28 = 11,638.75 : x
  2. Step 2: Convert to fraction form
    20,591.19/28,417.28 = 11,638.75/x
  3. Step 3: Cross multiply
    20,591.19x = 28,417.28 × 11,638.75
  4. Step 4: Simplify right side
    20,591.19x = 330,741,773.82
  5. Step 5: Solve for x
    x = 330,741,773.82/20,591.19
  6. Step 6: Final answer
    x = 16,062.30

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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.