Home / 19,128.74-28,631.68-10,221.80

Finding the Fourth Proportional to 19,128.74, 28,631.68 and 10,221.80

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Solution

The fourth proportional to 19,128.74, 28,631.68 and 10,221.80 is: 15,299.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128.74 : 28,631.68 = 10,221.80 : x
  2. Step 2: Convert to fraction form
    19,128.74/28,631.68 = 10,221.80/x
  3. Step 3: Cross multiply
    19,128.74x = 28,631.68 × 10,221.80
  4. Step 4: Simplify right side
    19,128.74x = 292,667,306.62
  5. Step 5: Solve for x
    x = 292,667,306.62/19,128.74
  6. Step 6: Final answer
    x = 15,299.87

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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.