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Finding the Fourth Proportional to 19,955.79, 29,914.63 and 7,472.88

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Solution

The fourth proportional to 19,955.79, 29,914.63 and 7,472.88 is: 11,202.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,955.79 : 29,914.63 = 7,472.88 : x
  2. Step 2: Convert to fraction form
    19,955.79/29,914.63 = 7,472.88/x
  3. Step 3: Cross multiply
    19,955.79x = 29,914.63 × 7,472.88
  4. Step 4: Simplify right side
    19,955.79x = 223,548,440.23
  5. Step 5: Solve for x
    x = 223,548,440.23/19,955.79
  6. Step 6: Final answer
    x = 11,202.18

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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.