Home / 20,549.95-28,357.31-12,591.09

Finding the Fourth Proportional to 20,549.95, 28,357.31 and 12,591.09

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Solution

The fourth proportional to 20,549.95, 28,357.31 and 12,591.09 is: 17,374.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,549.95 : 28,357.31 = 12,591.09 : x
  2. Step 2: Convert to fraction form
    20,549.95/28,357.31 = 12,591.09/x
  3. Step 3: Cross multiply
    20,549.95x = 28,357.31 × 12,591.09
  4. Step 4: Simplify right side
    20,549.95x = 357,049,473.85
  5. Step 5: Solve for x
    x = 357,049,473.85/20,549.95
  6. Step 6: Final answer
    x = 17,374.71

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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.