Home / 20,830.80-31,249.43-6,787.56

Finding the Fourth Proportional to 20,830.80, 31,249.43 and 6,787.56

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Solution

The fourth proportional to 20,830.80, 31,249.43 and 6,787.56 is: 10,182.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.80 : 31,249.43 = 6,787.56 : x
  2. Step 2: Convert to fraction form
    20,830.80/31,249.43 = 6,787.56/x
  3. Step 3: Cross multiply
    20,830.80x = 31,249.43 × 6,787.56
  4. Step 4: Simplify right side
    20,830.80x = 212,107,347.15
  5. Step 5: Solve for x
    x = 212,107,347.15/20,830.80
  6. Step 6: Final answer
    x = 10,182.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.