Home / 2,986.11-4,120.11-1,807.16

Finding the Fourth Proportional to 2,986.11, 4,120.11 and 1,807.16

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Solution

The fourth proportional to 2,986.11, 4,120.11 and 1,807.16 is: 2,493.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.11 : 4,120.11 = 1,807.16 : x
  2. Step 2: Convert to fraction form
    2,986.11/4,120.11 = 1,807.16/x
  3. Step 3: Cross multiply
    2,986.11x = 4,120.11 × 1,807.16
  4. Step 4: Simplify right side
    2,986.11x = 7,445,677.39
  5. Step 5: Solve for x
    x = 7,445,677.39/2,986.11
  6. Step 6: Final answer
    x = 2,493.44

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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.