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Finding the Fourth Proportional to 35.36, 53.00 and 20.93

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Solution

The fourth proportional to 35.36, 53.00 and 20.93 is: 31.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.36 : 53.00 = 20.93 : x
  2. Step 2: Convert to fraction form
    35.36/53.00 = 20.93/x
  3. Step 3: Cross multiply
    35.36x = 53.00 × 20.93
  4. Step 4: Simplify right side
    35.36x = 1,109.19
  5. Step 5: Solve for x
    x = 1,109.19/35.36
  6. Step 6: Final answer
    x = 31.37

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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.