Home / 13,149.88-18,166.02-11,378.40

Finding the Fourth Proportional to 13,149.88, 18,166.02 and 11,378.40

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Solution

The fourth proportional to 13,149.88, 18,166.02 and 11,378.40 is: 15,718.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.88 : 18,166.02 = 11,378.40 : x
  2. Step 2: Convert to fraction form
    13,149.88/18,166.02 = 11,378.40/x
  3. Step 3: Cross multiply
    13,149.88x = 18,166.02 × 11,378.40
  4. Step 4: Simplify right side
    13,149.88x = 206,700,241.97
  5. Step 5: Solve for x
    x = 206,700,241.97/13,149.88
  6. Step 6: Final answer
    x = 15,718.79

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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.