Home / 20,299.72-28,005.38-13,223.56

Finding the Fourth Proportional to 20,299.72, 28,005.38 and 13,223.56

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Solution

The fourth proportional to 20,299.72, 28,005.38 and 13,223.56 is: 18,243.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,299.72 : 28,005.38 = 13,223.56 : x
  2. Step 2: Convert to fraction form
    20,299.72/28,005.38 = 13,223.56/x
  3. Step 3: Cross multiply
    20,299.72x = 28,005.38 × 13,223.56
  4. Step 4: Simplify right side
    20,299.72x = 370,330,822.75
  5. Step 5: Solve for x
    x = 370,330,822.75/20,299.72
  6. Step 6: Final answer
    x = 18,243.15

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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.