Home / 21,708.08-29,957.36-12,755.78

Finding the Fourth Proportional to 21,708.08, 29,957.36 and 12,755.78

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Solution

The fourth proportional to 21,708.08, 29,957.36 and 12,755.78 is: 17,603.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,708.08 : 29,957.36 = 12,755.78 : x
  2. Step 2: Convert to fraction form
    21,708.08/29,957.36 = 12,755.78/x
  3. Step 3: Cross multiply
    21,708.08x = 29,957.36 × 12,755.78
  4. Step 4: Simplify right side
    21,708.08x = 382,129,279.98
  5. Step 5: Solve for x
    x = 382,129,279.98/21,708.08
  6. Step 6: Final answer
    x = 17,603.09

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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.