Home / 7,780.28-11,671.09-3,338.15

Finding the Fourth Proportional to 7,780.28, 11,671.09 and 3,338.15

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Solution

The fourth proportional to 7,780.28, 11,671.09 and 3,338.15 is: 5,007.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.28 : 11,671.09 = 3,338.15 : x
  2. Step 2: Convert to fraction form
    7,780.28/11,671.09 = 3,338.15/x
  3. Step 3: Cross multiply
    7,780.28x = 11,671.09 × 3,338.15
  4. Step 4: Simplify right side
    7,780.28x = 38,959,849.08
  5. Step 5: Solve for x
    x = 38,959,849.08/7,780.28
  6. Step 6: Final answer
    x = 5,007.51

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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.