Home / 15,139.12-20,882.27-9,768.42

Finding the Fourth Proportional to 15,139.12, 20,882.27 and 9,768.42

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Solution

The fourth proportional to 15,139.12, 20,882.27 and 9,768.42 is: 13,474.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.12 : 20,882.27 = 9,768.42 : x
  2. Step 2: Convert to fraction form
    15,139.12/20,882.27 = 9,768.42/x
  3. Step 3: Cross multiply
    15,139.12x = 20,882.27 × 9,768.42
  4. Step 4: Simplify right side
    15,139.12x = 203,986,783.91
  5. Step 5: Solve for x
    x = 203,986,783.91/15,139.12
  6. Step 6: Final answer
    x = 13,474.15

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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.