Home / 20,559.20-28,371.52-11,127.68

Finding the Fourth Proportional to 20,559.20, 28,371.52 and 11,127.68

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Solution

The fourth proportional to 20,559.20, 28,371.52 and 11,127.68 is: 15,356.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.20 : 28,371.52 = 11,127.68 : x
  2. Step 2: Convert to fraction form
    20,559.20/28,371.52 = 11,127.68/x
  3. Step 3: Cross multiply
    20,559.20x = 28,371.52 × 11,127.68
  4. Step 4: Simplify right side
    20,559.20x = 315,709,195.67
  5. Step 5: Solve for x
    x = 315,709,195.67/20,559.20
  6. Step 6: Final answer
    x = 15,356.10

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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.