Home / 3,112.47-4,294.85-1,786.61

Finding the Fourth Proportional to 3,112.47, 4,294.85 and 1,786.61

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Solution

The fourth proportional to 3,112.47, 4,294.85 and 1,786.61 is: 2,465.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.47 : 4,294.85 = 1,786.61 : x
  2. Step 2: Convert to fraction form
    3,112.47/4,294.85 = 1,786.61/x
  3. Step 3: Cross multiply
    3,112.47x = 4,294.85 × 1,786.61
  4. Step 4: Simplify right side
    3,112.47x = 7,673,223.76
  5. Step 5: Solve for x
    x = 7,673,223.76/3,112.47
  6. Step 6: Final answer
    x = 2,465.32

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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.