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Finding the Fourth Proportional to 35.08, 48.40 and 21.06

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Solution

The fourth proportional to 35.08, 48.40 and 21.06 is: 29.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.08 : 48.40 = 21.06 : x
  2. Step 2: Convert to fraction form
    35.08/48.40 = 21.06/x
  3. Step 3: Cross multiply
    35.08x = 48.40 × 21.06
  4. Step 4: Simplify right side
    35.08x = 1,019.30
  5. Step 5: Solve for x
    x = 1,019.30/35.08
  6. Step 6: Final answer
    x = 29.06

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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.