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Finding the Fourth Proportional to 53.36, 80.01 and 21.29

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Solution

The fourth proportional to 53.36, 80.01 and 21.29 is: 31.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.36 : 80.01 = 21.29 : x
  2. Step 2: Convert to fraction form
    53.36/80.01 = 21.29/x
  3. Step 3: Cross multiply
    53.36x = 80.01 × 21.29
  4. Step 4: Simplify right side
    53.36x = 1,703.01
  5. Step 5: Solve for x
    x = 1,703.01/53.36
  6. Step 6: Final answer
    x = 31.92

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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.