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Finding the Fourth Proportional to 10,998.72, 15,163.53 and 9,103.32

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Solution

The fourth proportional to 10,998.72, 15,163.53 and 9,103.32 is: 12,550.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,998.72 : 15,163.53 = 9,103.32 : x
  2. Step 2: Convert to fraction form
    10,998.72/15,163.53 = 9,103.32/x
  3. Step 3: Cross multiply
    10,998.72x = 15,163.53 × 9,103.32
  4. Step 4: Simplify right side
    10,998.72x = 138,038,465.92
  5. Step 5: Solve for x
    x = 138,038,465.92/10,998.72
  6. Step 6: Final answer
    x = 12,550.41

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.