Home / 20,877.84-28,811.25-11,446.38

Finding the Fourth Proportional to 20,877.84, 28,811.25 and 11,446.38

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Solution

The fourth proportional to 20,877.84, 28,811.25 and 11,446.38 is: 15,795.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.84 : 28,811.25 = 11,446.38 : x
  2. Step 2: Convert to fraction form
    20,877.84/28,811.25 = 11,446.38/x
  3. Step 3: Cross multiply
    20,877.84x = 28,811.25 × 11,446.38
  4. Step 4: Simplify right side
    20,877.84x = 329,784,515.78
  5. Step 5: Solve for x
    x = 329,784,515.78/20,877.84
  6. Step 6: Final answer
    x = 15,795.91

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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.