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Finding the Fourth Proportional to 12,215.84, 18,324.84 and 6,666.80

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Solution

The fourth proportional to 12,215.84, 18,324.84 and 6,666.80 is: 10,000.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.84 : 18,324.84 = 6,666.80 : x
  2. Step 2: Convert to fraction form
    12,215.84/18,324.84 = 6,666.80/x
  3. Step 3: Cross multiply
    12,215.84x = 18,324.84 × 6,666.80
  4. Step 4: Simplify right side
    12,215.84x = 122,168,043.31
  5. Step 5: Solve for x
    x = 122,168,043.31/12,215.84
  6. Step 6: Final answer
    x = 10,000.79

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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.