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Finding the Fourth Proportional to 15,084.19, 20,815.86 and 8,369.67

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Solution

The fourth proportional to 15,084.19, 20,815.86 and 8,369.67 is: 11,549.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,084.19 : 20,815.86 = 8,369.67 : x
  2. Step 2: Convert to fraction form
    15,084.19/20,815.86 = 8,369.67/x
  3. Step 3: Cross multiply
    15,084.19x = 20,815.86 × 8,369.67
  4. Step 4: Simplify right side
    15,084.19x = 174,221,878.97
  5. Step 5: Solve for x
    x = 174,221,878.97/15,084.19
  6. Step 6: Final answer
    x = 11,549.97

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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.