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Finding the Fourth Proportional to 35.45, 53.13 and 21.93

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Solution

The fourth proportional to 35.45, 53.13 and 21.93 is: 32.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.45 : 53.13 = 21.93 : x
  2. Step 2: Convert to fraction form
    35.45/53.13 = 21.93/x
  3. Step 3: Cross multiply
    35.45x = 53.13 × 21.93
  4. Step 4: Simplify right side
    35.45x = 1,165.14
  5. Step 5: Solve for x
    x = 1,165.14/35.45
  6. Step 6: Final answer
    x = 32.87

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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.