Home / 21,878.73-30,192.57-12,318.62

Finding the Fourth Proportional to 21,878.73, 30,192.57 and 12,318.62

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Solution

The fourth proportional to 21,878.73, 30,192.57 and 12,318.62 is: 16,999.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,878.73 : 30,192.57 = 12,318.62 : x
  2. Step 2: Convert to fraction form
    21,878.73/30,192.57 = 12,318.62/x
  3. Step 3: Cross multiply
    21,878.73x = 30,192.57 × 12,318.62
  4. Step 4: Simplify right side
    21,878.73x = 371,930,645.69
  5. Step 5: Solve for x
    x = 371,930,645.69/21,878.73
  6. Step 6: Final answer
    x = 16,999.65

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1.5x scale

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.