Home / 12,187.30-18,281.02-3,422.20

Finding the Fourth Proportional to 12,187.30, 18,281.02 and 3,422.20

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Solution

The fourth proportional to 12,187.30, 18,281.02 and 3,422.20 is: 5,133.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.30 : 18,281.02 = 3,422.20 : x
  2. Step 2: Convert to fraction form
    12,187.30/18,281.02 = 3,422.20/x
  3. Step 3: Cross multiply
    12,187.30x = 18,281.02 × 3,422.20
  4. Step 4: Simplify right side
    12,187.30x = 62,561,306.64
  5. Step 5: Solve for x
    x = 62,561,306.64/12,187.30
  6. Step 6: Final answer
    x = 5,133.32

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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.