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Finding the Fourth Proportional to 10.31, 15.51 and 10.28

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Solution

The fourth proportional to 10.31, 15.51 and 10.28 is: 15.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.31 : 15.51 = 10.28 : x
  2. Step 2: Convert to fraction form
    10.31/15.51 = 10.28/x
  3. Step 3: Cross multiply
    10.31x = 15.51 × 10.28
  4. Step 4: Simplify right side
    10.31x = 159.37
  5. Step 5: Solve for x
    x = 159.37/10.31
  6. Step 6: Final answer
    x = 15.46

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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.