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Finding the Fourth Proportional to 21,058.56, 29,064.06 and 12,996.92

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Solution

The fourth proportional to 21,058.56, 29,064.06 and 12,996.92 is: 17,937.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,058.56 : 29,064.06 = 12,996.92 : x
  2. Step 2: Convert to fraction form
    21,058.56/29,064.06 = 12,996.92/x
  3. Step 3: Cross multiply
    21,058.56x = 29,064.06 × 12,996.92
  4. Step 4: Simplify right side
    21,058.56x = 377,743,262.70
  5. Step 5: Solve for x
    x = 377,743,262.70/21,058.56
  6. Step 6: Final answer
    x = 17,937.75

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1.5x scale

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.