Home / 21,138.06-29,170.86-12,184.04

Finding the Fourth Proportional to 21,138.06, 29,170.86 and 12,184.04

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Solution

The fourth proportional to 21,138.06, 29,170.86 and 12,184.04 is: 16,814.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.06 : 29,170.86 = 12,184.04 : x
  2. Step 2: Convert to fraction form
    21,138.06/29,170.86 = 12,184.04/x
  3. Step 3: Cross multiply
    21,138.06x = 29,170.86 × 12,184.04
  4. Step 4: Simplify right side
    21,138.06x = 355,418,925.07
  5. Step 5: Solve for x
    x = 355,418,925.07/21,138.06
  6. Step 6: Final answer
    x = 16,814.17

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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.