Home / 5,115.61-7,059.31-2,877.45

Finding the Fourth Proportional to 5,115.61, 7,059.31 and 2,877.45

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Solution

The fourth proportional to 5,115.61, 7,059.31 and 2,877.45 is: 3,970.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.61 : 7,059.31 = 2,877.45 : x
  2. Step 2: Convert to fraction form
    5,115.61/7,059.31 = 2,877.45/x
  3. Step 3: Cross multiply
    5,115.61x = 7,059.31 × 2,877.45
  4. Step 4: Simplify right side
    5,115.61x = 20,312,811.56
  5. Step 5: Solve for x
    x = 20,312,811.56/5,115.61
  6. Step 6: Final answer
    x = 3,970.75

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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.