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Finding the Fourth Proportional to 35.78, 53.61 and 19.48

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Solution

The fourth proportional to 35.78, 53.61 and 19.48 is: 29.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.78 : 53.61 = 19.48 : x
  2. Step 2: Convert to fraction form
    35.78/53.61 = 19.48/x
  3. Step 3: Cross multiply
    35.78x = 53.61 × 19.48
  4. Step 4: Simplify right side
    35.78x = 1,044.48
  5. Step 5: Solve for x
    x = 1,044.48/35.78
  6. Step 6: Final answer
    x = 29.20

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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.