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Finding the Fourth Proportional to 10.94, 15.15 and 10.70

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Solution

The fourth proportional to 10.94, 15.15 and 10.70 is: 14.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.94 : 15.15 = 10.70 : x
  2. Step 2: Convert to fraction form
    10.94/15.15 = 10.70/x
  3. Step 3: Cross multiply
    10.94x = 15.15 × 10.70
  4. Step 4: Simplify right side
    10.94x = 162.03
  5. Step 5: Solve for x
    x = 162.03/10.94
  6. Step 6: Final answer
    x = 14.82

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.