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Finding the Fourth Proportional to 7.18, 10.70 and 6.93

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Solution

The fourth proportional to 7.18, 10.70 and 6.93 is: 10.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.18 : 10.70 = 6.93 : x
  2. Step 2: Convert to fraction form
    7.18/10.70 = 6.93/x
  3. Step 3: Cross multiply
    7.18x = 10.70 × 6.93
  4. Step 4: Simplify right side
    7.18x = 74.16
  5. Step 5: Solve for x
    x = 74.16/7.18
  6. Step 6: Final answer
    x = 10.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.