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Finding the Fourth Proportional to 9,265.20, 12,997.20 and 9,265.20

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Solution

The fourth proportional to 9,265.20, 12,997.20 and 9,265.20 is: 12,997.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,265.20 : 12,997.20 = 9,265.20 : x
  2. Step 2: Convert to fraction form
    9,265.20/12,997.20 = 9,265.20/x
  3. Step 3: Cross multiply
    9,265.20x = 12,997.20 × 9,265.20
  4. Step 4: Simplify right side
    9,265.20x = 120,421,657.44
  5. Step 5: Solve for x
    x = 120,421,657.44/9,265.20
  6. Step 6: Final answer
    x = 12,997.20

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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 (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.