Home / 12,489.06-17,230.77-8,242.23

Finding the Fourth Proportional to 12,489.06, 17,230.77 and 8,242.23

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Solution

The fourth proportional to 12,489.06, 17,230.77 and 8,242.23 is: 11,371.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.06 : 17,230.77 = 8,242.23 : x
  2. Step 2: Convert to fraction form
    12,489.06/17,230.77 = 8,242.23/x
  3. Step 3: Cross multiply
    12,489.06x = 17,230.77 × 8,242.23
  4. Step 4: Simplify right side
    12,489.06x = 142,019,969.42
  5. Step 5: Solve for x
    x = 142,019,969.42/12,489.06
  6. Step 6: Final answer
    x = 11,371.55

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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.