Home / 20,251.28-30,349.22-12,860.91

Finding the Fourth Proportional to 20,251.28, 30,349.22 and 12,860.91

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Solution

The fourth proportional to 20,251.28, 30,349.22 and 12,860.91 is: 19,273.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,251.28 : 30,349.22 = 12,860.91 : x
  2. Step 2: Convert to fraction form
    20,251.28/30,349.22 = 12,860.91/x
  3. Step 3: Cross multiply
    20,251.28x = 30,349.22 × 12,860.91
  4. Step 4: Simplify right side
    20,251.28x = 390,318,522.69
  5. Step 5: Solve for x
    x = 390,318,522.69/20,251.28
  6. Step 6: Final answer
    x = 19,273.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.