Home / 21,705.75-29,957.77-12,753.25

Finding the Fourth Proportional to 21,705.75, 29,957.77 and 12,753.25

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Solution

The fourth proportional to 21,705.75, 29,957.77 and 12,753.25 is: 17,601.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,705.75 : 29,957.77 = 12,753.25 : x
  2. Step 2: Convert to fraction form
    21,705.75/29,957.77 = 12,753.25/x
  3. Step 3: Cross multiply
    21,705.75x = 29,957.77 × 12,753.25
  4. Step 4: Simplify right side
    21,705.75x = 382,058,930.25
  5. Step 5: Solve for x
    x = 382,058,930.25/21,705.75
  6. Step 6: Final answer
    x = 17,601.74

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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.