Home / 51,391.32-77,040.20-19,781.20

Finding the Fourth Proportional to 51,391.32, 77,040.20 and 19,781.20

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Solution

The fourth proportional to 51,391.32, 77,040.20 and 19,781.20 is: 29,653.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,391.32 : 77,040.20 = 19,781.20 : x
  2. Step 2: Convert to fraction form
    51,391.32/77,040.20 = 19,781.20/x
  3. Step 3: Cross multiply
    51,391.32x = 77,040.20 × 19,781.20
  4. Step 4: Simplify right side
    51,391.32x = 1,523,947,604.24
  5. Step 5: Solve for x
    x = 1,523,947,604.24/51,391.32
  6. Step 6: Final answer
    x = 29,653.79

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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.