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Finding the Fourth Proportional to 19.55, 29.28 and 10.98

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Solution

The fourth proportional to 19.55, 29.28 and 10.98 is: 16.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.55 : 29.28 = 10.98 : x
  2. Step 2: Convert to fraction form
    19.55/29.28 = 10.98/x
  3. Step 3: Cross multiply
    19.55x = 29.28 × 10.98
  4. Step 4: Simplify right side
    19.55x = 321.49
  5. Step 5: Solve for x
    x = 321.49/19.55
  6. Step 6: Final answer
    x = 16.45

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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.