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Finding the Fourth Proportional to 12,135.61, 18,195.99 and 5,563.81

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Solution

The fourth proportional to 12,135.61, 18,195.99 and 5,563.81 is: 8,342.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.61 : 18,195.99 = 5,563.81 : x
  2. Step 2: Convert to fraction form
    12,135.61/18,195.99 = 5,563.81/x
  3. Step 3: Cross multiply
    12,135.61x = 18,195.99 × 5,563.81
  4. Step 4: Simplify right side
    12,135.61x = 101,239,031.12
  5. Step 5: Solve for x
    x = 101,239,031.12/12,135.61
  6. Step 6: Final answer
    x = 8,342.31

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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.