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Finding the Fourth Proportional to 20,891.52, 31,523.58 and 20,081.52

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Solution

The fourth proportional to 20,891.52, 31,523.58 and 20,081.52 is: 30,301.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.52 : 31,523.58 = 20,081.52 : x
  2. Step 2: Convert to fraction form
    20,891.52/31,523.58 = 20,081.52/x
  3. Step 3: Cross multiply
    20,891.52x = 31,523.58 × 20,081.52
  4. Step 4: Simplify right side
    20,891.52x = 633,041,402.24
  5. Step 5: Solve for x
    x = 633,041,402.24/20,891.52
  6. Step 6: Final answer
    x = 30,301.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.