Home / 20,539.20-28,344-11,107.68

Finding the Fourth Proportional to 20,539.20, 28,344 and 11,107.68

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Solution

The fourth proportional to 20,539.20, 28,344 and 11,107.68 is: 15,328.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.20 : 28,344 = 11,107.68 : x
  2. Step 2: Convert to fraction form
    20,539.20/28,344 = 11,107.68/x
  3. Step 3: Cross multiply
    20,539.20x = 28,344 × 11,107.68
  4. Step 4: Simplify right side
    20,539.20x = 314,836,081.92
  5. Step 5: Solve for x
    x = 314,836,081.92/20,539.20
  6. Step 6: Final answer
    x = 15,328.55

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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.