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Finding the Fourth Proportional to 12,418.99, 17,132.18 and 7,379.64

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Solution

The fourth proportional to 12,418.99, 17,132.18 and 7,379.64 is: 10,180.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,418.99 : 17,132.18 = 7,379.64 : x
  2. Step 2: Convert to fraction form
    12,418.99/17,132.18 = 7,379.64/x
  3. Step 3: Cross multiply
    12,418.99x = 17,132.18 × 7,379.64
  4. Step 4: Simplify right side
    12,418.99x = 126,429,283.92
  5. Step 5: Solve for x
    x = 126,429,283.92/12,418.99
  6. Step 6: Final answer
    x = 10,180.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.