Home / 20,320.46-30,474.49-7,169.76

Finding the Fourth Proportional to 20,320.46, 30,474.49 and 7,169.76

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Solution

The fourth proportional to 20,320.46, 30,474.49 and 7,169.76 is: 10,752.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.46 : 30,474.49 = 7,169.76 : x
  2. Step 2: Convert to fraction form
    20,320.46/30,474.49 = 7,169.76/x
  3. Step 3: Cross multiply
    20,320.46x = 30,474.49 × 7,169.76
  4. Step 4: Simplify right side
    20,320.46x = 218,494,779.42
  5. Step 5: Solve for x
    x = 218,494,779.42/20,320.46
  6. Step 6: Final answer
    x = 10,752.45

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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.