Home / 20,934.66-28,889.58-11,503.20

Finding the Fourth Proportional to 20,934.66, 28,889.58 and 11,503.20

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Solution

The fourth proportional to 20,934.66, 28,889.58 and 11,503.20 is: 15,874.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.66 : 28,889.58 = 11,503.20 : x
  2. Step 2: Convert to fraction form
    20,934.66/28,889.58 = 11,503.20/x
  3. Step 3: Cross multiply
    20,934.66x = 28,889.58 × 11,503.20
  4. Step 4: Simplify right side
    20,934.66x = 332,322,616.66
  5. Step 5: Solve for x
    x = 332,322,616.66/20,934.66
  6. Step 6: Final answer
    x = 15,874.28

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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.