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Finding the Fourth Proportional to 21,058.98, 29,049.21 and 13,606.98

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Solution

The fourth proportional to 21,058.98, 29,049.21 and 13,606.98 is: 18,769.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,058.98 : 29,049.21 = 13,606.98 : x
  2. Step 2: Convert to fraction form
    21,058.98/29,049.21 = 13,606.98/x
  3. Step 3: Cross multiply
    21,058.98x = 29,049.21 × 13,606.98
  4. Step 4: Simplify right side
    21,058.98x = 395,272,019.49
  5. Step 5: Solve for x
    x = 395,272,019.49/21,058.98
  6. Step 6: Final answer
    x = 18,769.76

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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.