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Finding the Fourth Proportional to 19.79, 29.63 and 17.51

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Solution

The fourth proportional to 19.79, 29.63 and 17.51 is: 26.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.79 : 29.63 = 17.51 : x
  2. Step 2: Convert to fraction form
    19.79/29.63 = 17.51/x
  3. Step 3: Cross multiply
    19.79x = 29.63 × 17.51
  4. Step 4: Simplify right side
    19.79x = 518.81
  5. Step 5: Solve for x
    x = 518.81/19.79
  6. Step 6: Final answer
    x = 26.21

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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.