Home / 22,318.20-30,786.48-12,885.12

Finding the Fourth Proportional to 22,318.20, 30,786.48 and 12,885.12

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Solution

The fourth proportional to 22,318.20, 30,786.48 and 12,885.12 is: 17,774.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,318.20 : 30,786.48 = 12,885.12 : x
  2. Step 2: Convert to fraction form
    22,318.20/30,786.48 = 12,885.12/x
  3. Step 3: Cross multiply
    22,318.20x = 30,786.48 × 12,885.12
  4. Step 4: Simplify right side
    22,318.20x = 396,687,489.18
  5. Step 5: Solve for x
    x = 396,687,489.18/22,318.20
  6. Step 6: Final answer
    x = 17,774.17

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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.