Home / 20,561.99-28,375.52-11,130.59

Finding the Fourth Proportional to 20,561.99, 28,375.52 and 11,130.59

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Solution

The fourth proportional to 20,561.99, 28,375.52 and 11,130.59 is: 15,360.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.99 : 28,375.52 = 11,130.59 : x
  2. Step 2: Convert to fraction form
    20,561.99/28,375.52 = 11,130.59/x
  3. Step 3: Cross multiply
    20,561.99x = 28,375.52 × 11,130.59
  4. Step 4: Simplify right side
    20,561.99x = 315,836,223.50
  5. Step 5: Solve for x
    x = 315,836,223.50/20,561.99
  6. Step 6: Final answer
    x = 15,360.20

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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.