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Finding the Fourth Proportional to 21,663.88, 29,896.16 and 12,233.04

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Solution

The fourth proportional to 21,663.88, 29,896.16 and 12,233.04 is: 16,881.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,663.88 : 29,896.16 = 12,233.04 : x
  2. Step 2: Convert to fraction form
    21,663.88/29,896.16 = 12,233.04/x
  3. Step 3: Cross multiply
    21,663.88x = 29,896.16 × 12,233.04
  4. Step 4: Simplify right side
    21,663.88x = 365,720,921.13
  5. Step 5: Solve for x
    x = 365,720,921.13/21,663.88
  6. Step 6: Final answer
    x = 16,881.60

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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.