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Finding the Fourth Proportional to 35.16, 53 and 31.96

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Solution

The fourth proportional to 35.16, 53 and 31.96 is: 48.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.16 : 53 = 31.96 : x
  2. Step 2: Convert to fraction form
    35.16/53 = 31.96/x
  3. Step 3: Cross multiply
    35.16x = 53 × 31.96
  4. Step 4: Simplify right side
    35.16x = 1,693.88
  5. Step 5: Solve for x
    x = 1,693.88/35.16
  6. Step 6: Final answer
    x = 48.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.