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Finding the Fourth Proportional to 8.91, 13.33 and 7.57

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Solution

The fourth proportional to 8.91, 13.33 and 7.57 is: 11.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.91 : 13.33 = 7.57 : x
  2. Step 2: Convert to fraction form
    8.91/13.33 = 7.57/x
  3. Step 3: Cross multiply
    8.91x = 13.33 × 7.57
  4. Step 4: Simplify right side
    8.91x = 100.91
  5. Step 5: Solve for x
    x = 100.91/8.91
  6. Step 6: Final answer
    x = 11.33

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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.