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Finding the Fourth Proportional to 15,998.79, 22,078.79 and 8,925.67

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Solution

The fourth proportional to 15,998.79, 22,078.79 and 8,925.67 is: 12,317.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,998.79 : 22,078.79 = 8,925.67 : x
  2. Step 2: Convert to fraction form
    15,998.79/22,078.79 = 8,925.67/x
  3. Step 3: Cross multiply
    15,998.79x = 22,078.79 × 8,925.67
  4. Step 4: Simplify right side
    15,998.79x = 197,067,993.54
  5. Step 5: Solve for x
    x = 197,067,993.54/15,998.79
  6. Step 6: Final answer
    x = 12,317.68

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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.