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Finding the Fourth Proportional to 8,389.56, 12,579.66 and 5,760.12

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Solution

The fourth proportional to 8,389.56, 12,579.66 and 5,760.12 is: 8,636.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,389.56 : 12,579.66 = 5,760.12 : x
  2. Step 2: Convert to fraction form
    8,389.56/12,579.66 = 5,760.12/x
  3. Step 3: Cross multiply
    8,389.56x = 12,579.66 × 5,760.12
  4. Step 4: Simplify right side
    8,389.56x = 72,460,351.16
  5. Step 5: Solve for x
    x = 72,460,351.16/8,389.56
  6. Step 6: Final answer
    x = 8,636.97

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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.