Home / 20,538.87-28,346.57-11,587.20

Finding the Fourth Proportional to 20,538.87, 28,346.57 and 11,587.20

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Solution

The fourth proportional to 20,538.87, 28,346.57 and 11,587.20 is: 15,991.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.87 : 28,346.57 = 11,587.20 : x
  2. Step 2: Convert to fraction form
    20,538.87/28,346.57 = 11,587.20/x
  3. Step 3: Cross multiply
    20,538.87x = 28,346.57 × 11,587.20
  4. Step 4: Simplify right side
    20,538.87x = 328,457,375.90
  5. Step 5: Solve for x
    x = 328,457,375.90/20,538.87
  6. Step 6: Final answer
    x = 15,991.99

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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.