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Finding the Fourth Proportional to 5,000.79, 6,900.68 and 2,876.21

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Solution

The fourth proportional to 5,000.79, 6,900.68 and 2,876.21 is: 3,968.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,000.79 : 6,900.68 = 2,876.21 : x
  2. Step 2: Convert to fraction form
    5,000.79/6,900.68 = 2,876.21/x
  3. Step 3: Cross multiply
    5,000.79x = 6,900.68 × 2,876.21
  4. Step 4: Simplify right side
    5,000.79x = 19,847,790.44
  5. Step 5: Solve for x
    x = 19,847,790.44/5,000.79
  6. Step 6: Final answer
    x = 3,968.93

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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.