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Finding the Fourth Proportional to 21,792.78, 32,691 and 7,760.45

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Solution

The fourth proportional to 21,792.78, 32,691 and 7,760.45 is: 11,641.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,792.78 : 32,691 = 7,760.45 : x
  2. Step 2: Convert to fraction form
    21,792.78/32,691 = 7,760.45/x
  3. Step 3: Cross multiply
    21,792.78x = 32,691 × 7,760.45
  4. Step 4: Simplify right side
    21,792.78x = 253,696,707.50
  5. Step 5: Solve for x
    x = 253,696,707.50/21,792.78
  6. Step 6: Final answer
    x = 11,641.32

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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.