Home / 31,645.76-43,680.24-20,898.48

Finding the Fourth Proportional to 31,645.76, 43,680.24 and 20,898.48

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Solution

The fourth proportional to 31,645.76, 43,680.24 and 20,898.48 is: 28,845.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,645.76 : 43,680.24 = 20,898.48 : x
  2. Step 2: Convert to fraction form
    31,645.76/43,680.24 = 20,898.48/x
  3. Step 3: Cross multiply
    31,645.76x = 43,680.24 × 20,898.48
  4. Step 4: Simplify right side
    31,645.76x = 912,850,622.04
  5. Step 5: Solve for x
    x = 912,850,622.04/31,645.76
  6. Step 6: Final answer
    x = 28,845.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.