Home / 20,872.84-28,803.45-11,439.58

Finding the Fourth Proportional to 20,872.84, 28,803.45 and 11,439.58

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Solution

The fourth proportional to 20,872.84, 28,803.45 and 11,439.58 is: 15,786.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.84 : 28,803.45 = 11,439.58 : x
  2. Step 2: Convert to fraction form
    20,872.84/28,803.45 = 11,439.58/x
  3. Step 3: Cross multiply
    20,872.84x = 28,803.45 × 11,439.58
  4. Step 4: Simplify right side
    20,872.84x = 329,499,370.55
  5. Step 5: Solve for x
    x = 329,499,370.55/20,872.84
  6. Step 6: Final answer
    x = 15,786.03

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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.