Home / 20,959.85-31,408.89-15,670.04

Finding the Fourth Proportional to 20,959.85, 31,408.89 and 15,670.04

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Solution

The fourth proportional to 20,959.85, 31,408.89 and 15,670.04 is: 23,481.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.85 : 31,408.89 = 15,670.04 : x
  2. Step 2: Convert to fraction form
    20,959.85/31,408.89 = 15,670.04/x
  3. Step 3: Cross multiply
    20,959.85x = 31,408.89 × 15,670.04
  4. Step 4: Simplify right side
    20,959.85x = 492,178,405.61
  5. Step 5: Solve for x
    x = 492,178,405.61/20,959.85
  6. Step 6: Final answer
    x = 23,481.97

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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.