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Finding the Fourth Proportional to 18,391.47, 27,583.10 and 8,529.47

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Solution

The fourth proportional to 18,391.47, 27,583.10 and 8,529.47 is: 12,792.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.47 : 27,583.10 = 8,529.47 : x
  2. Step 2: Convert to fraction form
    18,391.47/27,583.10 = 8,529.47/x
  3. Step 3: Cross multiply
    18,391.47x = 27,583.10 × 8,529.47
  4. Step 4: Simplify right side
    18,391.47x = 235,269,223.96
  5. Step 5: Solve for x
    x = 235,269,223.96/18,391.47
  6. Step 6: Final answer
    x = 12,792.30

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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.