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Finding the Fourth Proportional to 7,908.70, 11,864.67 and 4,620.10

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Solution

The fourth proportional to 7,908.70, 11,864.67 and 4,620.10 is: 6,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,908.70 : 11,864.67 = 4,620.10 : x
  2. Step 2: Convert to fraction form
    7,908.70/11,864.67 = 4,620.10/x
  3. Step 3: Cross multiply
    7,908.70x = 11,864.67 × 4,620.10
  4. Step 4: Simplify right side
    7,908.70x = 54,815,961.87
  5. Step 5: Solve for x
    x = 54,815,961.87/7,908.70
  6. Step 6: Final answer
    x = 6,931.10

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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.