Home / 12,138.26-18,220.35-5,217.62

Finding the Fourth Proportional to 12,138.26, 18,220.35 and 5,217.62

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Solution

The fourth proportional to 12,138.26, 18,220.35 and 5,217.62 is: 7,832.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.26 : 18,220.35 = 5,217.62 : x
  2. Step 2: Convert to fraction form
    12,138.26/18,220.35 = 5,217.62/x
  3. Step 3: Cross multiply
    12,138.26x = 18,220.35 × 5,217.62
  4. Step 4: Simplify right side
    12,138.26x = 95,066,862.57
  5. Step 5: Solve for x
    x = 95,066,862.57/12,138.26
  6. Step 6: Final answer
    x = 7,832.00

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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.