Home / 20,531.90-30,788.27-10,668.53

Finding the Fourth Proportional to 20,531.90, 30,788.27 and 10,668.53

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Solution

The fourth proportional to 20,531.90, 30,788.27 and 10,668.53 is: 15,997.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.90 : 30,788.27 = 10,668.53 : x
  2. Step 2: Convert to fraction form
    20,531.90/30,788.27 = 10,668.53/x
  3. Step 3: Cross multiply
    20,531.90x = 30,788.27 × 10,668.53
  4. Step 4: Simplify right side
    20,531.90x = 328,465,582.14
  5. Step 5: Solve for x
    x = 328,465,582.14/20,531.90
  6. Step 6: Final answer
    x = 15,997.82

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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.