Home / 51,378.31-77,072.59-13,939.00

Finding the Fourth Proportional to 51,378.31, 77,072.59 and 13,939.00

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Solution

The fourth proportional to 51,378.31, 77,072.59 and 13,939.00 is: 20,909.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,378.31 : 77,072.59 = 13,939.00 : x
  2. Step 2: Convert to fraction form
    51,378.31/77,072.59 = 13,939.00/x
  3. Step 3: Cross multiply
    51,378.31x = 77,072.59 × 13,939.00
  4. Step 4: Simplify right side
    51,378.31x = 1,074,314,411.80
  5. Step 5: Solve for x
    x = 1,074,314,411.80/51,378.31
  6. Step 6: Final answer
    x = 20,909.88

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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.