Home / 3,126.15-4,689.89-1,178.37

Finding the Fourth Proportional to 3,126.15, 4,689.89 and 1,178.37

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Solution

The fourth proportional to 3,126.15, 4,689.89 and 1,178.37 is: 1,767.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.15 : 4,689.89 = 1,178.37 : x
  2. Step 2: Convert to fraction form
    3,126.15/4,689.89 = 1,178.37/x
  3. Step 3: Cross multiply
    3,126.15x = 4,689.89 × 1,178.37
  4. Step 4: Simplify right side
    3,126.15x = 5,526,419.79
  5. Step 5: Solve for x
    x = 5,526,419.79/3,126.15
  6. Step 6: Final answer
    x = 1,767.80

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1.5x scale

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.