Home / 5,115.88-7,059.84-2,877.72

Finding the Fourth Proportional to 5,115.88, 7,059.84 and 2,877.72

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Solution

The fourth proportional to 5,115.88, 7,059.84 and 2,877.72 is: 3,971.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.88 : 7,059.84 = 2,877.72 : x
  2. Step 2: Convert to fraction form
    5,115.88/7,059.84 = 2,877.72/x
  3. Step 3: Cross multiply
    5,115.88x = 7,059.84 × 2,877.72
  4. Step 4: Simplify right side
    5,115.88x = 20,316,242.76
  5. Step 5: Solve for x
    x = 20,316,242.76/5,115.88
  6. Step 6: Final answer
    x = 3,971.21

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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.