Home / 20,872.32-28,803.68-11,441.28

Finding the Fourth Proportional to 20,872.32, 28,803.68 and 11,441.28

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Solution

The fourth proportional to 20,872.32, 28,803.68 and 11,441.28 is: 15,788.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.32 : 28,803.68 = 11,441.28 : x
  2. Step 2: Convert to fraction form
    20,872.32/28,803.68 = 11,441.28/x
  3. Step 3: Cross multiply
    20,872.32x = 28,803.68 × 11,441.28
  4. Step 4: Simplify right side
    20,872.32x = 329,550,967.91
  5. Step 5: Solve for x
    x = 329,550,967.91/20,872.32
  6. Step 6: Final answer
    x = 15,788.90

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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.