Home / 5,115.71-7,059.21-2,877.68

Finding the Fourth Proportional to 5,115.71, 7,059.21 and 2,877.68

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Solution

The fourth proportional to 5,115.71, 7,059.21 and 2,877.68 is: 3,970.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.71 : 7,059.21 = 2,877.68 : x
  2. Step 2: Convert to fraction form
    5,115.71/7,059.21 = 2,877.68/x
  3. Step 3: Cross multiply
    5,115.71x = 7,059.21 × 2,877.68
  4. Step 4: Simplify right side
    5,115.71x = 20,314,147.43
  5. Step 5: Solve for x
    x = 20,314,147.43/5,115.71
  6. Step 6: Final answer
    x = 3,970.93

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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.