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Finding the Fourth Proportional to 21,061.64, 29,064.68 and 11,630

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Solution

The fourth proportional to 21,061.64, 29,064.68 and 11,630 is: 16,049.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061.64 : 29,064.68 = 11,630 : x
  2. Step 2: Convert to fraction form
    21,061.64/29,064.68 = 11,630/x
  3. Step 3: Cross multiply
    21,061.64x = 29,064.68 × 11,630
  4. Step 4: Simplify right side
    21,061.64x = 338,022,228.40
  5. Step 5: Solve for x
    x = 338,022,228.40/21,061.64
  6. Step 6: Final answer
    x = 16,049.19

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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.