Home / 20,123.10-30,184.65-18,243.90

Finding the Fourth Proportional to 20,123.10, 30,184.65 and 18,243.90

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Solution

The fourth proportional to 20,123.10, 30,184.65 and 18,243.90 is: 27,365.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.10 : 30,184.65 = 18,243.90 : x
  2. Step 2: Convert to fraction form
    20,123.10/30,184.65 = 18,243.90/x
  3. Step 3: Cross multiply
    20,123.10x = 30,184.65 × 18,243.90
  4. Step 4: Simplify right side
    20,123.10x = 550,685,736.14
  5. Step 5: Solve for x
    x = 550,685,736.14/20,123.10
  6. Step 6: Final answer
    x = 27,365.85

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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.