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Finding the Fourth Proportional to 21,637.72, 29,860.14 and 11,701.72

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Solution

The fourth proportional to 21,637.72, 29,860.14 and 11,701.72 is: 16,148.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,637.72 : 29,860.14 = 11,701.72 : x
  2. Step 2: Convert to fraction form
    21,637.72/29,860.14 = 11,701.72/x
  3. Step 3: Cross multiply
    21,637.72x = 29,860.14 × 11,701.72
  4. Step 4: Simplify right side
    21,637.72x = 349,414,997.44
  5. Step 5: Solve for x
    x = 349,414,997.44/21,637.72
  6. Step 6: Final answer
    x = 16,148.42

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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.