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Finding the Fourth Proportional to 7, 10.51 and 6.38

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Solution

The fourth proportional to 7, 10.51 and 6.38 is: 9.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7 : 10.51 = 6.38 : x
  2. Step 2: Convert to fraction form
    7/10.51 = 6.38/x
  3. Step 3: Cross multiply
    7x = 10.51 × 6.38
  4. Step 4: Simplify right side
    7x = 67.05
  5. Step 5: Solve for x
    x = 67.05/7
  6. Step 6: Final answer
    x = 9.58

Related Problems

Find fourth proportional to 3.50, 5.26 and 3.19
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Double scale
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Similar ratio
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1.5x scale

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.