Home / 21,159.61-29,199.26-12,209.99

Finding the Fourth Proportional to 21,159.61, 29,199.26 and 12,209.99

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Solution

The fourth proportional to 21,159.61, 29,199.26 and 12,209.99 is: 16,849.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.61 : 29,199.26 = 12,209.99 : x
  2. Step 2: Convert to fraction form
    21,159.61/29,199.26 = 12,209.99/x
  3. Step 3: Cross multiply
    21,159.61x = 29,199.26 × 12,209.99
  4. Step 4: Simplify right side
    21,159.61x = 356,522,611.56
  5. Step 5: Solve for x
    x = 356,522,611.56/21,159.61
  6. Step 6: Final answer
    x = 16,849.21

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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.