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Finding the Fourth Proportional to 35.83, 53.75 and 21.38

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Solution

The fourth proportional to 35.83, 53.75 and 21.38 is: 32.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.83 : 53.75 = 21.38 : x
  2. Step 2: Convert to fraction form
    35.83/53.75 = 21.38/x
  3. Step 3: Cross multiply
    35.83x = 53.75 × 21.38
  4. Step 4: Simplify right side
    35.83x = 1,149.18
  5. Step 5: Solve for x
    x = 1,149.18/35.83
  6. Step 6: Final answer
    x = 32.07

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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.