Home / 20,742.72-31,109.89-5,947.66

Finding the Fourth Proportional to 20,742.72, 31,109.89 and 5,947.66

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Solution

The fourth proportional to 20,742.72, 31,109.89 and 5,947.66 is: 8,920.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.72 : 31,109.89 = 5,947.66 : x
  2. Step 2: Convert to fraction form
    20,742.72/31,109.89 = 5,947.66/x
  3. Step 3: Cross multiply
    20,742.72x = 31,109.89 × 5,947.66
  4. Step 4: Simplify right side
    20,742.72x = 185,031,048.36
  5. Step 5: Solve for x
    x = 185,031,048.36/20,742.72
  6. Step 6: Final answer
    x = 8,920.29

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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.