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Finding the Fourth Proportional to 9,279.92, 12,808.68 and 6,300.74

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Solution

The fourth proportional to 9,279.92, 12,808.68 and 6,300.74 is: 8,696.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,279.92 : 12,808.68 = 6,300.74 : x
  2. Step 2: Convert to fraction form
    9,279.92/12,808.68 = 6,300.74/x
  3. Step 3: Cross multiply
    9,279.92x = 12,808.68 × 6,300.74
  4. Step 4: Simplify right side
    9,279.92x = 80,704,162.42
  5. Step 5: Solve for x
    x = 80,704,162.42/9,279.92
  6. Step 6: Final answer
    x = 8,696.64

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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.