Home / 25,732.80-38,570.40-10,939.20

Finding the Fourth Proportional to 25,732.80, 38,570.40 and 10,939.20

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Solution

The fourth proportional to 25,732.80, 38,570.40 and 10,939.20 is: 16,396.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,732.80 : 38,570.40 = 10,939.20 : x
  2. Step 2: Convert to fraction form
    25,732.80/38,570.40 = 10,939.20/x
  3. Step 3: Cross multiply
    25,732.80x = 38,570.40 × 10,939.20
  4. Step 4: Simplify right side
    25,732.80x = 421,929,319.68
  5. Step 5: Solve for x
    x = 421,929,319.68/25,732.80
  6. Step 6: Final answer
    x = 16,396.56

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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.