Home / 28,556.73-42,788.28-20,221.78

Finding the Fourth Proportional to 28,556.73, 42,788.28 and 20,221.78

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Solution

The fourth proportional to 28,556.73, 42,788.28 and 20,221.78 is: 30,299.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,556.73 : 42,788.28 = 20,221.78 : x
  2. Step 2: Convert to fraction form
    28,556.73/42,788.28 = 20,221.78/x
  3. Step 3: Cross multiply
    28,556.73x = 42,788.28 × 20,221.78
  4. Step 4: Simplify right side
    28,556.73x = 865,254,942.86
  5. Step 5: Solve for x
    x = 865,254,942.86/28,556.73
  6. Step 6: Final answer
    x = 30,299.51

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1.5x scale

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.