Home / 15,400.28-21,251.58-8,685.92

Finding the Fourth Proportional to 15,400.28, 21,251.58 and 8,685.92

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Solution

The fourth proportional to 15,400.28, 21,251.58 and 8,685.92 is: 11,986.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.28 : 21,251.58 = 8,685.92 : x
  2. Step 2: Convert to fraction form
    15,400.28/21,251.58 = 8,685.92/x
  3. Step 3: Cross multiply
    15,400.28x = 21,251.58 × 8,685.92
  4. Step 4: Simplify right side
    15,400.28x = 184,589,523.75
  5. Step 5: Solve for x
    x = 184,589,523.75/15,400.28
  6. Step 6: Final answer
    x = 11,986.11

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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.