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Finding the Fourth Proportional to 20,100.87, 27,721.04 and 12,547.89

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Solution

The fourth proportional to 20,100.87, 27,721.04 and 12,547.89 is: 17,304.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,100.87 : 27,721.04 = 12,547.89 : x
  2. Step 2: Convert to fraction form
    20,100.87/27,721.04 = 12,547.89/x
  3. Step 3: Cross multiply
    20,100.87x = 27,721.04 × 12,547.89
  4. Step 4: Simplify right side
    20,100.87x = 347,840,674.73
  5. Step 5: Solve for x
    x = 347,840,674.73/20,100.87
  6. Step 6: Final answer
    x = 17,304.76

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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.