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Finding the Fourth Proportional to 10,880, 15,014.40 and 5,912

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Solution

The fourth proportional to 10,880, 15,014.40 and 5,912 is: 8,158.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,880 : 15,014.40 = 5,912 : x
  2. Step 2: Convert to fraction form
    10,880/15,014.40 = 5,912/x
  3. Step 3: Cross multiply
    10,880x = 15,014.40 × 5,912
  4. Step 4: Simplify right side
    10,880x = 88,765,132.80
  5. Step 5: Solve for x
    x = 88,765,132.80/10,880
  6. Step 6: Final answer
    x = 8,158.56

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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.