Home / 13,169.28-18,184.08-8,140.80

Finding the Fourth Proportional to 13,169.28, 18,184.08 and 8,140.80

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Solution

The fourth proportional to 13,169.28, 18,184.08 and 8,140.80 is: 11,240.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,169.28 : 18,184.08 = 8,140.80 : x
  2. Step 2: Convert to fraction form
    13,169.28/18,184.08 = 8,140.80/x
  3. Step 3: Cross multiply
    13,169.28x = 18,184.08 × 8,140.80
  4. Step 4: Simplify right side
    13,169.28x = 148,032,958.46
  5. Step 5: Solve for x
    x = 148,032,958.46/13,169.28
  6. Step 6: Final answer
    x = 11,240.78

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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.