Home / 15,439.38-21,306.21-8,365.86

Finding the Fourth Proportional to 15,439.38, 21,306.21 and 8,365.86

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Solution

The fourth proportional to 15,439.38, 21,306.21 and 8,365.86 is: 11,544.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.38 : 21,306.21 = 8,365.86 : x
  2. Step 2: Convert to fraction form
    15,439.38/21,306.21 = 8,365.86/x
  3. Step 3: Cross multiply
    15,439.38x = 21,306.21 × 8,365.86
  4. Step 4: Simplify right side
    15,439.38x = 178,244,769.99
  5. Step 5: Solve for x
    x = 178,244,769.99/15,439.38
  6. Step 6: Final answer
    x = 11,544.81

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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.