Home / 20,821.68-28,732.18-11,746.54

Finding the Fourth Proportional to 20,821.68, 28,732.18 and 11,746.54

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Solution

The fourth proportional to 20,821.68, 28,732.18 and 11,746.54 is: 16,209.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.68 : 28,732.18 = 11,746.54 : x
  2. Step 2: Convert to fraction form
    20,821.68/28,732.18 = 11,746.54/x
  3. Step 3: Cross multiply
    20,821.68x = 28,732.18 × 11,746.54
  4. Step 4: Simplify right side
    20,821.68x = 337,503,701.66
  5. Step 5: Solve for x
    x = 337,503,701.66/20,821.68
  6. Step 6: Final answer
    x = 16,209.24

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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.