Home / 31,847.91-43,920.14-20,506.47

Finding the Fourth Proportional to 31,847.91, 43,920.14 and 20,506.47

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Solution

The fourth proportional to 31,847.91, 43,920.14 and 20,506.47 is: 28,279.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,847.91 : 43,920.14 = 20,506.47 : x
  2. Step 2: Convert to fraction form
    31,847.91/43,920.14 = 20,506.47/x
  3. Step 3: Cross multiply
    31,847.91x = 43,920.14 × 20,506.47
  4. Step 4: Simplify right side
    31,847.91x = 900,646,930.77
  5. Step 5: Solve for x
    x = 900,646,930.77/31,847.91
  6. Step 6: Final answer
    x = 28,279.62

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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.