Home / 22,202.28-30,639.60-12,771.45

Finding the Fourth Proportional to 22,202.28, 30,639.60 and 12,771.45

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Solution

The fourth proportional to 22,202.28, 30,639.60 and 12,771.45 is: 17,624.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,202.28 : 30,639.60 = 12,771.45 : x
  2. Step 2: Convert to fraction form
    22,202.28/30,639.60 = 12,771.45/x
  3. Step 3: Cross multiply
    22,202.28x = 30,639.60 × 12,771.45
  4. Step 4: Simplify right side
    22,202.28x = 391,312,119.42
  5. Step 5: Solve for x
    x = 391,312,119.42/22,202.28
  6. Step 6: Final answer
    x = 17,624.86

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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.