Home / 12,239.67-18,356.40-5,215.80

Finding the Fourth Proportional to 12,239.67, 18,356.40 and 5,215.80

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Solution

The fourth proportional to 12,239.67, 18,356.40 and 5,215.80 is: 7,822.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.67 : 18,356.40 = 5,215.80 : x
  2. Step 2: Convert to fraction form
    12,239.67/18,356.40 = 5,215.80/x
  3. Step 3: Cross multiply
    12,239.67x = 18,356.40 × 5,215.80
  4. Step 4: Simplify right side
    12,239.67x = 95,743,311.12
  5. Step 5: Solve for x
    x = 95,743,311.12/12,239.67
  6. Step 6: Final answer
    x = 7,822.38

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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.