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Finding the Fourth Proportional to 8,061.88, 11,999.64 and 7,880.44

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Solution

The fourth proportional to 8,061.88, 11,999.64 and 7,880.44 is: 11,729.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,061.88 : 11,999.64 = 7,880.44 : x
  2. Step 2: Convert to fraction form
    8,061.88/11,999.64 = 7,880.44/x
  3. Step 3: Cross multiply
    8,061.88x = 11,999.64 × 7,880.44
  4. Step 4: Simplify right side
    8,061.88x = 94,562,443.04
  5. Step 5: Solve for x
    x = 94,562,443.04/8,061.88
  6. Step 6: Final answer
    x = 11,729.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.