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Finding the Fourth Proportional to 7,418.64, 11,135.76 and 7,251.28

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Solution

The fourth proportional to 7,418.64, 11,135.76 and 7,251.28 is: 10,884.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,418.64 : 11,135.76 = 7,251.28 : x
  2. Step 2: Convert to fraction form
    7,418.64/11,135.76 = 7,251.28/x
  3. Step 3: Cross multiply
    7,418.64x = 11,135.76 × 7,251.28
  4. Step 4: Simplify right side
    7,418.64x = 80,748,513.77
  5. Step 5: Solve for x
    x = 80,748,513.77/7,418.64
  6. Step 6: Final answer
    x = 10,884.54

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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.