Home / 3,126.78-4,686.93-1,667.70

Finding the Fourth Proportional to 3,126.78, 4,686.93 and 1,667.70

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Solution

The fourth proportional to 3,126.78, 4,686.93 and 1,667.70 is: 2,499.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.78 : 4,686.93 = 1,667.70 : x
  2. Step 2: Convert to fraction form
    3,126.78/4,686.93 = 1,667.70/x
  3. Step 3: Cross multiply
    3,126.78x = 4,686.93 × 1,667.70
  4. Step 4: Simplify right side
    3,126.78x = 7,816,393.16
  5. Step 5: Solve for x
    x = 7,816,393.16/3,126.78
  6. Step 6: Final answer
    x = 2,499.82

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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.