Home / 5,115.86-7,059.15-2,877.65

Finding the Fourth Proportional to 5,115.86, 7,059.15 and 2,877.65

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Solution

The fourth proportional to 5,115.86, 7,059.15 and 2,877.65 is: 3,970.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.86 : 7,059.15 = 2,877.65 : x
  2. Step 2: Convert to fraction form
    5,115.86/7,059.15 = 2,877.65/x
  3. Step 3: Cross multiply
    5,115.86x = 7,059.15 × 2,877.65
  4. Step 4: Simplify right side
    5,115.86x = 20,313,727.70
  5. Step 5: Solve for x
    x = 20,313,727.70/5,115.86
  6. Step 6: Final answer
    x = 3,970.74

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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.