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Finding the Fourth Proportional to 35.17, 48.52 and 21.16

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Solution

The fourth proportional to 35.17, 48.52 and 21.16 is: 29.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.17 : 48.52 = 21.16 : x
  2. Step 2: Convert to fraction form
    35.17/48.52 = 21.16/x
  3. Step 3: Cross multiply
    35.17x = 48.52 × 21.16
  4. Step 4: Simplify right side
    35.17x = 1,026.61
  5. Step 5: Solve for x
    x = 1,026.61/35.17
  6. Step 6: Final answer
    x = 29.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.