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Finding the Fourth Proportional to 17.58, 24.30 and 15.18

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Solution

The fourth proportional to 17.58, 24.30 and 15.18 is: 20.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.58 : 24.30 = 15.18 : x
  2. Step 2: Convert to fraction form
    17.58/24.30 = 15.18/x
  3. Step 3: Cross multiply
    17.58x = 24.30 × 15.18
  4. Step 4: Simplify right side
    17.58x = 368.87
  5. Step 5: Solve for x
    x = 368.87/17.58
  6. Step 6: Final answer
    x = 20.98

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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.