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Finding the Fourth Proportional to 21,653.56, 29,881.86 and 11,717.56

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Solution

The fourth proportional to 21,653.56, 29,881.86 and 11,717.56 is: 16,170.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653.56 : 29,881.86 = 11,717.56 : x
  2. Step 2: Convert to fraction form
    21,653.56/29,881.86 = 11,717.56/x
  3. Step 3: Cross multiply
    21,653.56x = 29,881.86 × 11,717.56
  4. Step 4: Simplify right side
    21,653.56x = 350,142,487.46
  5. Step 5: Solve for x
    x = 350,142,487.46/21,653.56
  6. Step 6: Final answer
    x = 16,170.20

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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.