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Finding the Fourth Proportional to 17,728.70, 26,605.20 and 9,831.20

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Solution

The fourth proportional to 17,728.70, 26,605.20 and 9,831.20 is: 14,753.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,728.70 : 26,605.20 = 9,831.20 : x
  2. Step 2: Convert to fraction form
    17,728.70/26,605.20 = 9,831.20/x
  3. Step 3: Cross multiply
    17,728.70x = 26,605.20 × 9,831.20
  4. Step 4: Simplify right side
    17,728.70x = 261,561,042.24
  5. Step 5: Solve for x
    x = 261,561,042.24/17,728.70
  6. Step 6: Final answer
    x = 14,753.54

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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.