Home / 20,742.57-28,616.61-12,770.95

Finding the Fourth Proportional to 20,742.57, 28,616.61 and 12,770.95

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Solution

The fourth proportional to 20,742.57, 28,616.61 and 12,770.95 is: 17,618.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.57 : 28,616.61 = 12,770.95 : x
  2. Step 2: Convert to fraction form
    20,742.57/28,616.61 = 12,770.95/x
  3. Step 3: Cross multiply
    20,742.57x = 28,616.61 × 12,770.95
  4. Step 4: Simplify right side
    20,742.57x = 365,461,295.48
  5. Step 5: Solve for x
    x = 365,461,295.48/20,742.57
  6. Step 6: Final answer
    x = 17,618.90

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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.