Home / 12,180.80-18,271.20-11,816.30

Finding the Fourth Proportional to 12,180.80, 18,271.20 and 11,816.30

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Solution

The fourth proportional to 12,180.80, 18,271.20 and 11,816.30 is: 17,724.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.80 : 18,271.20 = 11,816.30 : x
  2. Step 2: Convert to fraction form
    12,180.80/18,271.20 = 11,816.30/x
  3. Step 3: Cross multiply
    12,180.80x = 18,271.20 × 11,816.30
  4. Step 4: Simplify right side
    12,180.80x = 215,897,980.56
  5. Step 5: Solve for x
    x = 215,897,980.56/12,180.80
  6. Step 6: Final answer
    x = 17,724.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.