Home / 20,929.88-28,883.24-11,499.05

Finding the Fourth Proportional to 20,929.88, 28,883.24 and 11,499.05

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Solution

The fourth proportional to 20,929.88, 28,883.24 and 11,499.05 is: 15,868.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.88 : 28,883.24 = 11,499.05 : x
  2. Step 2: Convert to fraction form
    20,929.88/28,883.24 = 11,499.05/x
  3. Step 3: Cross multiply
    20,929.88x = 28,883.24 × 11,499.05
  4. Step 4: Simplify right side
    20,929.88x = 332,129,705.25
  5. Step 5: Solve for x
    x = 332,129,705.25/20,929.88
  6. Step 6: Final answer
    x = 15,868.69

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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.