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Finding the Fourth Proportional to 9,279.24, 12,817.62 and 6,917.28

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Solution

The fourth proportional to 9,279.24, 12,817.62 and 6,917.28 is: 9,554.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,279.24 : 12,817.62 = 6,917.28 : x
  2. Step 2: Convert to fraction form
    9,279.24/12,817.62 = 6,917.28/x
  3. Step 3: Cross multiply
    9,279.24x = 12,817.62 × 6,917.28
  4. Step 4: Simplify right side
    9,279.24x = 88,663,066.47
  5. Step 5: Solve for x
    x = 88,663,066.47/9,279.24
  6. Step 6: Final answer
    x = 9,554.99

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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.