Home / 13,168.66-18,182.27-8,139.78

Finding the Fourth Proportional to 13,168.66, 18,182.27 and 8,139.78

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Solution

The fourth proportional to 13,168.66, 18,182.27 and 8,139.78 is: 11,238.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,168.66 : 18,182.27 = 8,139.78 : x
  2. Step 2: Convert to fraction form
    13,168.66/18,182.27 = 8,139.78/x
  3. Step 3: Cross multiply
    13,168.66x = 18,182.27 × 8,139.78
  4. Step 4: Simplify right side
    13,168.66x = 147,999,677.70
  5. Step 5: Solve for x
    x = 147,999,677.70/13,168.66
  6. Step 6: Final answer
    x = 11,238.78

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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.