Home / 28,359.30-39,189.78-21,273.42

Finding the Fourth Proportional to 28,359.30, 39,189.78 and 21,273.42

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Solution

The fourth proportional to 28,359.30, 39,189.78 and 21,273.42 is: 29,397.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.30 : 39,189.78 = 21,273.42 : x
  2. Step 2: Convert to fraction form
    28,359.30/39,189.78 = 21,273.42/x
  3. Step 3: Cross multiply
    28,359.30x = 39,189.78 × 21,273.42
  4. Step 4: Simplify right side
    28,359.30x = 833,700,649.65
  5. Step 5: Solve for x
    x = 833,700,649.65/28,359.30
  6. Step 6: Final answer
    x = 29,397.79

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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.