Home / 20,559.24-28,371.72-11,127.84

Finding the Fourth Proportional to 20,559.24, 28,371.72 and 11,127.84

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Solution

The fourth proportional to 20,559.24, 28,371.72 and 11,127.84 is: 15,356.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.24 : 28,371.72 = 11,127.84 : x
  2. Step 2: Convert to fraction form
    20,559.24/28,371.72 = 11,127.84/x
  3. Step 3: Cross multiply
    20,559.24x = 28,371.72 × 11,127.84
  4. Step 4: Simplify right side
    20,559.24x = 315,715,960.68
  5. Step 5: Solve for x
    x = 315,715,960.68/20,559.24
  6. Step 6: Final answer
    x = 15,356.40

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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.