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Finding the Fourth Proportional to 21,158, 29,199.04 and 12,207.52

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Solution

The fourth proportional to 21,158, 29,199.04 and 12,207.52 is: 16,846.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158 : 29,199.04 = 12,207.52 : x
  2. Step 2: Convert to fraction form
    21,158/29,199.04 = 12,207.52/x
  3. Step 3: Cross multiply
    21,158x = 29,199.04 × 12,207.52
  4. Step 4: Simplify right side
    21,158x = 356,447,864.78
  5. Step 5: Solve for x
    x = 356,447,864.78/21,158
  6. Step 6: Final answer
    x = 16,846.95

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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.