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Finding the Fourth Proportional to 9.84, 14.75 and 4.75

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Solution

The fourth proportional to 9.84, 14.75 and 4.75 is: 7.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.84 : 14.75 = 4.75 : x
  2. Step 2: Convert to fraction form
    9.84/14.75 = 4.75/x
  3. Step 3: Cross multiply
    9.84x = 14.75 × 4.75
  4. Step 4: Simplify right side
    9.84x = 70.02
  5. Step 5: Solve for x
    x = 70.02/9.84
  6. Step 6: Final answer
    x = 7.11

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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.