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Finding the Fourth Proportional to 8,138.40, 12,169.20 and 6,064.80

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Solution

The fourth proportional to 8,138.40, 12,169.20 and 6,064.80 is: 9,068.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.40 : 12,169.20 = 6,064.80 : x
  2. Step 2: Convert to fraction form
    8,138.40/12,169.20 = 6,064.80/x
  3. Step 3: Cross multiply
    8,138.40x = 12,169.20 × 6,064.80
  4. Step 4: Simplify right side
    8,138.40x = 73,803,764.16
  5. Step 5: Solve for x
    x = 73,803,764.16/8,138.40
  6. Step 6: Final answer
    x = 9,068.58

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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.