Home / 25,939.72-38,905.80-13,422.52

Finding the Fourth Proportional to 25,939.72, 38,905.80 and 13,422.52

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Solution

The fourth proportional to 25,939.72, 38,905.80 and 13,422.52 is: 20,131.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,939.72 : 38,905.80 = 13,422.52 : x
  2. Step 2: Convert to fraction form
    25,939.72/38,905.80 = 13,422.52/x
  3. Step 3: Cross multiply
    25,939.72x = 38,905.80 × 13,422.52
  4. Step 4: Simplify right side
    25,939.72x = 522,213,878.62
  5. Step 5: Solve for x
    x = 522,213,878.62/25,939.72
  6. Step 6: Final answer
    x = 20,131.82

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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.