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Finding the Fourth Proportional to 7,881.66, 11,825.28 and 3,498.72

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Solution

The fourth proportional to 7,881.66, 11,825.28 and 3,498.72 is: 5,249.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.66 : 11,825.28 = 3,498.72 : x
  2. Step 2: Convert to fraction form
    7,881.66/11,825.28 = 3,498.72/x
  3. Step 3: Cross multiply
    7,881.66x = 11,825.28 × 3,498.72
  4. Step 4: Simplify right side
    7,881.66x = 41,373,343.64
  5. Step 5: Solve for x
    x = 41,373,343.64/7,881.66
  6. Step 6: Final answer
    x = 5,249.32

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1.5x scale

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.