Home / 20,787.98-28,685.82-11,833.70

Finding the Fourth Proportional to 20,787.98, 28,685.82 and 11,833.70

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Solution

The fourth proportional to 20,787.98, 28,685.82 and 11,833.70 is: 16,329.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.98 : 28,685.82 = 11,833.70 : x
  2. Step 2: Convert to fraction form
    20,787.98/28,685.82 = 11,833.70/x
  3. Step 3: Cross multiply
    20,787.98x = 28,685.82 × 11,833.70
  4. Step 4: Simplify right side
    20,787.98x = 339,459,388.13
  5. Step 5: Solve for x
    x = 339,459,388.13/20,787.98
  6. Step 6: Final answer
    x = 16,329.60

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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.