Home / 13,489.09-18,616.35-8,113.30

Finding the Fourth Proportional to 13,489.09, 18,616.35 and 8,113.30

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Solution

The fourth proportional to 13,489.09, 18,616.35 and 8,113.30 is: 11,197.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.09 : 18,616.35 = 8,113.30 : x
  2. Step 2: Convert to fraction form
    13,489.09/18,616.35 = 8,113.30/x
  3. Step 3: Cross multiply
    13,489.09x = 18,616.35 × 8,113.30
  4. Step 4: Simplify right side
    13,489.09x = 151,040,032.46
  5. Step 5: Solve for x
    x = 151,040,032.46/13,489.09
  6. Step 6: Final answer
    x = 11,197.20

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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.