Home / 20,401.50-28,154.59-11,449.69

Finding the Fourth Proportional to 20,401.50, 28,154.59 and 11,449.69

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Solution

The fourth proportional to 20,401.50, 28,154.59 and 11,449.69 is: 15,800.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,401.50 : 28,154.59 = 11,449.69 : x
  2. Step 2: Convert to fraction form
    20,401.50/28,154.59 = 11,449.69/x
  3. Step 3: Cross multiply
    20,401.50x = 28,154.59 × 11,449.69
  4. Step 4: Simplify right side
    20,401.50x = 322,361,228.57
  5. Step 5: Solve for x
    x = 322,361,228.57/20,401.50
  6. Step 6: Final answer
    x = 15,800.86

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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.