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Finding the Fourth Proportional to 21,079.44, 29,089.52 and 11,648

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Solution

The fourth proportional to 21,079.44, 29,089.52 and 11,648 is: 16,074.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.44 : 29,089.52 = 11,648 : x
  2. Step 2: Convert to fraction form
    21,079.44/29,089.52 = 11,648/x
  3. Step 3: Cross multiply
    21,079.44x = 29,089.52 × 11,648
  4. Step 4: Simplify right side
    21,079.44x = 338,834,728.96
  5. Step 5: Solve for x
    x = 338,834,728.96/21,079.44
  6. Step 6: Final answer
    x = 16,074.18

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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.