Home / 5,166.65-7,129.98-2,808.78

Finding the Fourth Proportional to 5,166.65, 7,129.98 and 2,808.78

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Solution

The fourth proportional to 5,166.65, 7,129.98 and 2,808.78 is: 3,876.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,166.65 : 7,129.98 = 2,808.78 : x
  2. Step 2: Convert to fraction form
    5,166.65/7,129.98 = 2,808.78/x
  3. Step 3: Cross multiply
    5,166.65x = 7,129.98 × 2,808.78
  4. Step 4: Simplify right side
    5,166.65x = 20,026,545.22
  5. Step 5: Solve for x
    x = 20,026,545.22/5,166.65
  6. Step 6: Final answer
    x = 3,876.12

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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.