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Finding the Fourth Proportional to 10,368.65, 15,571.20 and 10,040.60

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Solution

The fourth proportional to 10,368.65, 15,571.20 and 10,040.60 is: 15,078.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,368.65 : 15,571.20 = 10,040.60 : x
  2. Step 2: Convert to fraction form
    10,368.65/15,571.20 = 10,040.60/x
  3. Step 3: Cross multiply
    10,368.65x = 15,571.20 × 10,040.60
  4. Step 4: Simplify right side
    10,368.65x = 156,344,190.72
  5. Step 5: Solve for x
    x = 156,344,190.72/10,368.65
  6. Step 6: Final answer
    x = 15,078.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.