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Finding the Fourth Proportional to 8,298.70, 12,411.60 and 6,330.40

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Solution

The fourth proportional to 8,298.70, 12,411.60 and 6,330.40 is: 9,467.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,298.70 : 12,411.60 = 6,330.40 : x
  2. Step 2: Convert to fraction form
    8,298.70/12,411.60 = 6,330.40/x
  3. Step 3: Cross multiply
    8,298.70x = 12,411.60 × 6,330.40
  4. Step 4: Simplify right side
    8,298.70x = 78,570,392.64
  5. Step 5: Solve for x
    x = 78,570,392.64/8,298.70
  6. Step 6: Final answer
    x = 9,467.80

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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.