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Finding the Fourth Proportional to 8,998.75, 12,418.28 and 5,272.75

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Solution

The fourth proportional to 8,998.75, 12,418.28 and 5,272.75 is: 7,276.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,998.75 : 12,418.28 = 5,272.75 : x
  2. Step 2: Convert to fraction form
    8,998.75/12,418.28 = 5,272.75/x
  3. Step 3: Cross multiply
    8,998.75x = 12,418.28 × 5,272.75
  4. Step 4: Simplify right side
    8,998.75x = 65,478,485.87
  5. Step 5: Solve for x
    x = 65,478,485.87/8,998.75
  6. Step 6: Final answer
    x = 7,276.40

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.