Home / 12,187.13-18,281.70-3,422.12

Finding the Fourth Proportional to 12,187.13, 18,281.70 and 3,422.12

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Solution

The fourth proportional to 12,187.13, 18,281.70 and 3,422.12 is: 5,133.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.13 : 18,281.70 = 3,422.12 : x
  2. Step 2: Convert to fraction form
    12,187.13/18,281.70 = 3,422.12/x
  3. Step 3: Cross multiply
    12,187.13x = 18,281.70 × 3,422.12
  4. Step 4: Simplify right side
    12,187.13x = 62,562,079.80
  5. Step 5: Solve for x
    x = 62,562,079.80/12,187.13
  6. Step 6: Final answer
    x = 5,133.46

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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.