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Finding the Fourth Proportional to 40.07, 60.08 and 12.99

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Solution

The fourth proportional to 40.07, 60.08 and 12.99 is: 19.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.07 : 60.08 = 12.99 : x
  2. Step 2: Convert to fraction form
    40.07/60.08 = 12.99/x
  3. Step 3: Cross multiply
    40.07x = 60.08 × 12.99
  4. Step 4: Simplify right side
    40.07x = 780.37
  5. Step 5: Solve for x
    x = 780.37/40.07
  6. Step 6: Final answer
    x = 19.48

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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.