Home / 20,788.20-28,692.18-12,724.74

Finding the Fourth Proportional to 20,788.20, 28,692.18 and 12,724.74

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Solution

The fourth proportional to 20,788.20, 28,692.18 and 12,724.74 is: 17,562.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.20 : 28,692.18 = 12,724.74 : x
  2. Step 2: Convert to fraction form
    20,788.20/28,692.18 = 12,724.74/x
  3. Step 3: Cross multiply
    20,788.20x = 28,692.18 × 12,724.74
  4. Step 4: Simplify right side
    20,788.20x = 365,100,530.53
  5. Step 5: Solve for x
    x = 365,100,530.53/20,788.20
  6. Step 6: Final answer
    x = 17,562.87

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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.