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Finding the Fourth Proportional to 8,164.80, 12,261.60 and 6,320.40

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Solution

The fourth proportional to 8,164.80, 12,261.60 and 6,320.40 is: 9,491.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,164.80 : 12,261.60 = 6,320.40 : x
  2. Step 2: Convert to fraction form
    8,164.80/12,261.60 = 6,320.40/x
  3. Step 3: Cross multiply
    8,164.80x = 12,261.60 × 6,320.40
  4. Step 4: Simplify right side
    8,164.80x = 77,498,216.64
  5. Step 5: Solve for x
    x = 77,498,216.64/8,164.80
  6. Step 6: Final answer
    x = 9,491.75

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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.