Home / 21,078.73-31,586.81-8,583.47

Finding the Fourth Proportional to 21,078.73, 31,586.81 and 8,583.47

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Solution

The fourth proportional to 21,078.73, 31,586.81 and 8,583.47 is: 12,862.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.73 : 31,586.81 = 8,583.47 : x
  2. Step 2: Convert to fraction form
    21,078.73/31,586.81 = 8,583.47/x
  3. Step 3: Cross multiply
    21,078.73x = 31,586.81 × 8,583.47
  4. Step 4: Simplify right side
    21,078.73x = 271,124,436.03
  5. Step 5: Solve for x
    x = 271,124,436.03/21,078.73
  6. Step 6: Final answer
    x = 12,862.47

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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.