Home / 21,076.73-31,583.81-8,581.47

Finding the Fourth Proportional to 21,076.73, 31,583.81 and 8,581.47

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Solution

The fourth proportional to 21,076.73, 31,583.81 and 8,581.47 is: 12,859.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.73 : 31,583.81 = 8,581.47 : x
  2. Step 2: Convert to fraction form
    21,076.73/31,583.81 = 8,581.47/x
  3. Step 3: Cross multiply
    21,076.73x = 31,583.81 × 8,581.47
  4. Step 4: Simplify right side
    21,076.73x = 271,035,539.45
  5. Step 5: Solve for x
    x = 271,035,539.45/21,076.73
  6. Step 6: Final answer
    x = 12,859.47

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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.