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Finding the Fourth Proportional to 10.51, 15.58 and 10.40

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Solution

The fourth proportional to 10.51, 15.58 and 10.40 is: 15.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.51 : 15.58 = 10.40 : x
  2. Step 2: Convert to fraction form
    10.51/15.58 = 10.40/x
  3. Step 3: Cross multiply
    10.51x = 15.58 × 10.40
  4. Step 4: Simplify right side
    10.51x = 162.03
  5. Step 5: Solve for x
    x = 162.03/10.51
  6. Step 6: Final answer
    x = 15.42

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.