Home / 51,387.31-77,034.21-19,777.20

Finding the Fourth Proportional to 51,387.31, 77,034.21 and 19,777.20

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Solution

The fourth proportional to 51,387.31, 77,034.21 and 19,777.20 is: 29,647.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,387.31 : 77,034.21 = 19,777.20 : x
  2. Step 2: Convert to fraction form
    51,387.31/77,034.21 = 19,777.20/x
  3. Step 3: Cross multiply
    51,387.31x = 77,034.21 × 19,777.20
  4. Step 4: Simplify right side
    51,387.31x = 1,523,520,978.01
  5. Step 5: Solve for x
    x = 1,523,520,978.01/51,387.31
  6. Step 6: Final answer
    x = 29,647.81

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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.