Home / 20,836.79-28,747.66-11,877.84

Finding the Fourth Proportional to 20,836.79, 28,747.66 and 11,877.84

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Solution

The fourth proportional to 20,836.79, 28,747.66 and 11,877.84 is: 16,387.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.79 : 28,747.66 = 11,877.84 : x
  2. Step 2: Convert to fraction form
    20,836.79/28,747.66 = 11,877.84/x
  3. Step 3: Cross multiply
    20,836.79x = 28,747.66 × 11,877.84
  4. Step 4: Simplify right side
    20,836.79x = 341,460,098.43
  5. Step 5: Solve for x
    x = 341,460,098.43/20,836.79
  6. Step 6: Final answer
    x = 16,387.36

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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.