Home / 20,868.70-31,308.19-6,077.75

Finding the Fourth Proportional to 20,868.70, 31,308.19 and 6,077.75

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Solution

The fourth proportional to 20,868.70, 31,308.19 and 6,077.75 is: 9,118.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.70 : 31,308.19 = 6,077.75 : x
  2. Step 2: Convert to fraction form
    20,868.70/31,308.19 = 6,077.75/x
  3. Step 3: Cross multiply
    20,868.70x = 31,308.19 × 6,077.75
  4. Step 4: Simplify right side
    20,868.70x = 190,283,351.77
  5. Step 5: Solve for x
    x = 190,283,351.77/20,868.70
  6. Step 6: Final answer
    x = 9,118.12

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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.