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Finding the Fourth Proportional to 21,887.34, 32,831.67 and 8,559.81

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Solution

The fourth proportional to 21,887.34, 32,831.67 and 8,559.81 is: 12,839.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,887.34 : 32,831.67 = 8,559.81 : x
  2. Step 2: Convert to fraction form
    21,887.34/32,831.67 = 8,559.81/x
  3. Step 3: Cross multiply
    21,887.34x = 32,831.67 × 8,559.81
  4. Step 4: Simplify right side
    21,887.34x = 281,032,857.18
  5. Step 5: Solve for x
    x = 281,032,857.18/21,887.34
  6. Step 6: Final answer
    x = 12,839.97

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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.