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Finding the Fourth Proportional to 7,931.59, 11,889.11 and 2,662.63

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Solution

The fourth proportional to 7,931.59, 11,889.11 and 2,662.63 is: 3,991.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,931.59 : 11,889.11 = 2,662.63 : x
  2. Step 2: Convert to fraction form
    7,931.59/11,889.11 = 2,662.63/x
  3. Step 3: Cross multiply
    7,931.59x = 11,889.11 × 2,662.63
  4. Step 4: Simplify right side
    7,931.59x = 31,656,287.65
  5. Step 5: Solve for x
    x = 31,656,287.65/7,931.59
  6. Step 6: Final answer
    x = 3,991.17

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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.