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Finding the Fourth Proportional to 7,921.68, 11,892.24 and 7,260.72

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Solution

The fourth proportional to 7,921.68, 11,892.24 and 7,260.72 is: 10,899.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.68 : 11,892.24 = 7,260.72 : x
  2. Step 2: Convert to fraction form
    7,921.68/11,892.24 = 7,260.72/x
  3. Step 3: Cross multiply
    7,921.68x = 11,892.24 × 7,260.72
  4. Step 4: Simplify right side
    7,921.68x = 86,346,224.81
  5. Step 5: Solve for x
    x = 86,346,224.81/7,921.68
  6. Step 6: Final answer
    x = 10,899.99

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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.