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Finding the Fourth Proportional to 21,616.79, 29,831.02 and 12,662.37

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Solution

The fourth proportional to 21,616.79, 29,831.02 and 12,662.37 is: 17,473.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,616.79 : 29,831.02 = 12,662.37 : x
  2. Step 2: Convert to fraction form
    21,616.79/29,831.02 = 12,662.37/x
  3. Step 3: Cross multiply
    21,616.79x = 29,831.02 × 12,662.37
  4. Step 4: Simplify right side
    21,616.79x = 377,731,381.06
  5. Step 5: Solve for x
    x = 377,731,381.06/21,616.79
  6. Step 6: Final answer
    x = 17,473.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.