Home / 20,836.80-28,747.62-11,877.84

Finding the Fourth Proportional to 20,836.80, 28,747.62 and 11,877.84

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Solution

The fourth proportional to 20,836.80, 28,747.62 and 11,877.84 is: 16,387.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.80 : 28,747.62 = 11,877.84 : x
  2. Step 2: Convert to fraction form
    20,836.80/28,747.62 = 11,877.84/x
  3. Step 3: Cross multiply
    20,836.80x = 28,747.62 × 11,877.84
  4. Step 4: Simplify right side
    20,836.80x = 341,459,630.74
  5. Step 5: Solve for x
    x = 341,459,630.74/20,836.80
  6. Step 6: Final answer
    x = 16,387.34

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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.