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Finding the Fourth Proportional to 62,274, 93,411.81 and 20,721

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Solution

The fourth proportional to 62,274, 93,411.81 and 20,721 is: 31,081.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,274 : 93,411.81 = 20,721 : x
  2. Step 2: Convert to fraction form
    62,274/93,411.81 = 20,721/x
  3. Step 3: Cross multiply
    62,274x = 93,411.81 × 20,721
  4. Step 4: Simplify right side
    62,274x = 1,935,586,115.01
  5. Step 5: Solve for x
    x = 1,935,586,115.01/62,274
  6. Step 6: Final answer
    x = 31,081.77

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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.