Home / 12,127.46-18,191.19-3,808.21

Finding the Fourth Proportional to 12,127.46, 18,191.19 and 3,808.21

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Solution

The fourth proportional to 12,127.46, 18,191.19 and 3,808.21 is: 5,712.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,127.46 : 18,191.19 = 3,808.21 : x
  2. Step 2: Convert to fraction form
    12,127.46/18,191.19 = 3,808.21/x
  3. Step 3: Cross multiply
    12,127.46x = 18,191.19 × 3,808.21
  4. Step 4: Simplify right side
    12,127.46x = 69,275,871.67
  5. Step 5: Solve for x
    x = 69,275,871.67/12,127.46
  6. Step 6: Final answer
    x = 5,712.32

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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.