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Finding the Fourth Proportional to 19,908.81, 29,854.02 and 7,425.50

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Solution

The fourth proportional to 19,908.81, 29,854.02 and 7,425.50 is: 11,134.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,908.81 : 29,854.02 = 7,425.50 : x
  2. Step 2: Convert to fraction form
    19,908.81/29,854.02 = 7,425.50/x
  3. Step 3: Cross multiply
    19,908.81x = 29,854.02 × 7,425.50
  4. Step 4: Simplify right side
    19,908.81x = 221,680,946.28
  5. Step 5: Solve for x
    x = 221,680,946.28/19,908.81
  6. Step 6: Final answer
    x = 11,134.81

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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.