Home / 12,008.40-18,012.78-3,243.30

Finding the Fourth Proportional to 12,008.40, 18,012.78 and 3,243.30

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Solution

The fourth proportional to 12,008.40, 18,012.78 and 3,243.30 is: 4,865.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,008.40 : 18,012.78 = 3,243.30 : x
  2. Step 2: Convert to fraction form
    12,008.40/18,012.78 = 3,243.30/x
  3. Step 3: Cross multiply
    12,008.40x = 18,012.78 × 3,243.30
  4. Step 4: Simplify right side
    12,008.40x = 58,420,849.37
  5. Step 5: Solve for x
    x = 58,420,849.37/12,008.40
  6. Step 6: Final answer
    x = 4,865.00

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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.