Home / 21,639.12-29,860.20-12,210

Finding the Fourth Proportional to 21,639.12, 29,860.20 and 12,210

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Solution

The fourth proportional to 21,639.12, 29,860.20 and 12,210 is: 16,848.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.12 : 29,860.20 = 12,210 : x
  2. Step 2: Convert to fraction form
    21,639.12/29,860.20 = 12,210/x
  3. Step 3: Cross multiply
    21,639.12x = 29,860.20 × 12,210
  4. Step 4: Simplify right side
    21,639.12x = 364,593,042
  5. Step 5: Solve for x
    x = 364,593,042/21,639.12
  6. Step 6: Final answer
    x = 16,848.79

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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.