Home / 5,115.67-7,059.98-2,877.76

Finding the Fourth Proportional to 5,115.67, 7,059.98 and 2,877.76

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Solution

The fourth proportional to 5,115.67, 7,059.98 and 2,877.76 is: 3,971.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.67 : 7,059.98 = 2,877.76 : x
  2. Step 2: Convert to fraction form
    5,115.67/7,059.98 = 2,877.76/x
  3. Step 3: Cross multiply
    5,115.67x = 7,059.98 × 2,877.76
  4. Step 4: Simplify right side
    5,115.67x = 20,316,878.36
  5. Step 5: Solve for x
    x = 20,316,878.36/5,115.67
  6. Step 6: Final answer
    x = 3,971.50

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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.