Home / 20,912.20-31,368.30-5,329.24

Finding the Fourth Proportional to 20,912.20, 31,368.30 and 5,329.24

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Solution

The fourth proportional to 20,912.20, 31,368.30 and 5,329.24 is: 7,993.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.20 : 31,368.30 = 5,329.24 : x
  2. Step 2: Convert to fraction form
    20,912.20/31,368.30 = 5,329.24/x
  3. Step 3: Cross multiply
    20,912.20x = 31,368.30 × 5,329.24
  4. Step 4: Simplify right side
    20,912.20x = 167,169,199.09
  5. Step 5: Solve for x
    x = 167,169,199.09/20,912.20
  6. Step 6: Final answer
    x = 7,993.86

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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.