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Finding the Fourth Proportional to 19.93, 29.78 and 14.87

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Solution

The fourth proportional to 19.93, 29.78 and 14.87 is: 22.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.93 : 29.78 = 14.87 : x
  2. Step 2: Convert to fraction form
    19.93/29.78 = 14.87/x
  3. Step 3: Cross multiply
    19.93x = 29.78 × 14.87
  4. Step 4: Simplify right side
    19.93x = 442.83
  5. Step 5: Solve for x
    x = 442.83/19.93
  6. Step 6: Final answer
    x = 22.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.