Home / 13,177.72-18,154.02-9,191.80

Finding the Fourth Proportional to 13,177.72, 18,154.02 and 9,191.80

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Solution

The fourth proportional to 13,177.72, 18,154.02 and 9,191.80 is: 12,662.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,177.72 : 18,154.02 = 9,191.80 : x
  2. Step 2: Convert to fraction form
    13,177.72/18,154.02 = 9,191.80/x
  3. Step 3: Cross multiply
    13,177.72x = 18,154.02 × 9,191.80
  4. Step 4: Simplify right side
    13,177.72x = 166,868,121.04
  5. Step 5: Solve for x
    x = 166,868,121.04/13,177.72
  6. Step 6: Final answer
    x = 12,662.90

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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.