Home / 12,187.21-18,280.73-3,422.13

Finding the Fourth Proportional to 12,187.21, 18,280.73 and 3,422.13

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Solution

The fourth proportional to 12,187.21, 18,280.73 and 3,422.13 is: 5,133.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.21 : 18,280.73 = 3,422.13 : x
  2. Step 2: Convert to fraction form
    12,187.21/18,280.73 = 3,422.13/x
  3. Step 3: Cross multiply
    12,187.21x = 18,280.73 × 3,422.13
  4. Step 4: Simplify right side
    12,187.21x = 62,559,111.66
  5. Step 5: Solve for x
    x = 62,559,111.66/12,187.21
  6. Step 6: Final answer
    x = 5,133.18

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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.