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Finding the Fourth Proportional to 13,390.65, 18,479.25 and 8,084.48

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Solution

The fourth proportional to 13,390.65, 18,479.25 and 8,084.48 is: 11,156.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.65 : 18,479.25 = 8,084.48 : x
  2. Step 2: Convert to fraction form
    13,390.65/18,479.25 = 8,084.48/x
  3. Step 3: Cross multiply
    13,390.65x = 18,479.25 × 8,084.48
  4. Step 4: Simplify right side
    13,390.65x = 149,395,034.64
  5. Step 5: Solve for x
    x = 149,395,034.64/13,390.65
  6. Step 6: Final answer
    x = 11,156.67

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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.