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Finding the Fourth Proportional to 0.13, 0.18 and 0.08

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Solution

The fourth proportional to 0.13, 0.18 and 0.08 is: 0.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    0.13 : 0.18 = 0.08 : x
  2. Step 2: Convert to fraction form
    0.13/0.18 = 0.08/x
  3. Step 3: Cross multiply
    0.13x = 0.18 × 0.08
  4. Step 4: Simplify right side
    0.13x = 0.01
  5. Step 5: Solve for x
    x = 0.01/0.13
  6. Step 6: Final answer
    x = 0.12

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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.