Home / 45,428.91-68,143.49-13,839.18

Finding the Fourth Proportional to 45,428.91, 68,143.49 and 13,839.18

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Solution

The fourth proportional to 45,428.91, 68,143.49 and 13,839.18 is: 20,758.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,428.91 : 68,143.49 = 13,839.18 : x
  2. Step 2: Convert to fraction form
    45,428.91/68,143.49 = 13,839.18/x
  3. Step 3: Cross multiply
    45,428.91x = 68,143.49 × 13,839.18
  4. Step 4: Simplify right side
    45,428.91x = 943,050,023.94
  5. Step 5: Solve for x
    x = 943,050,023.94/45,428.91
  6. Step 6: Final answer
    x = 20,758.81

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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.