Home / 3,135.64-4,707.30-1,986.20

Finding the Fourth Proportional to 3,135.64, 4,707.30 and 1,986.20

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Solution

The fourth proportional to 3,135.64, 4,707.30 and 1,986.20 is: 2,981.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,135.64 : 4,707.30 = 1,986.20 : x
  2. Step 2: Convert to fraction form
    3,135.64/4,707.30 = 1,986.20/x
  3. Step 3: Cross multiply
    3,135.64x = 4,707.30 × 1,986.20
  4. Step 4: Simplify right side
    3,135.64x = 9,349,639.26
  5. Step 5: Solve for x
    x = 9,349,639.26/3,135.64
  6. Step 6: Final answer
    x = 2,981.73

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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.