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Finding the Fourth Proportional to 56.01, 84 and 19.92

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Solution

The fourth proportional to 56.01, 84 and 19.92 is: 29.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.01 : 84 = 19.92 : x
  2. Step 2: Convert to fraction form
    56.01/84 = 19.92/x
  3. Step 3: Cross multiply
    56.01x = 84 × 19.92
  4. Step 4: Simplify right side
    56.01x = 1,673.28
  5. Step 5: Solve for x
    x = 1,673.28/56.01
  6. Step 6: Final answer
    x = 29.87

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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.