Home / 21,850.31-30,155.94-12,160.76

Finding the Fourth Proportional to 21,850.31, 30,155.94 and 12,160.76

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Solution

The fourth proportional to 21,850.31, 30,155.94 and 12,160.76 is: 16,783.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.31 : 30,155.94 = 12,160.76 : x
  2. Step 2: Convert to fraction form
    21,850.31/30,155.94 = 12,160.76/x
  3. Step 3: Cross multiply
    21,850.31x = 30,155.94 × 12,160.76
  4. Step 4: Simplify right side
    21,850.31x = 366,718,998.13
  5. Step 5: Solve for x
    x = 366,718,998.13/21,850.31
  6. Step 6: Final answer
    x = 16,783.24

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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.