Home / 7,129.55-10,686.76-2,745.11

Finding the Fourth Proportional to 7,129.55, 10,686.76 and 2,745.11

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Solution

The fourth proportional to 7,129.55, 10,686.76 and 2,745.11 is: 4,114.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.55 : 10,686.76 = 2,745.11 : x
  2. Step 2: Convert to fraction form
    7,129.55/10,686.76 = 2,745.11/x
  3. Step 3: Cross multiply
    7,129.55x = 10,686.76 × 2,745.11
  4. Step 4: Simplify right side
    7,129.55x = 29,336,331.74
  5. Step 5: Solve for x
    x = 29,336,331.74/7,129.55
  6. Step 6: Final answer
    x = 4,114.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.