Home / 15,790.49-21,790.31-8,716.76

Finding the Fourth Proportional to 15,790.49, 21,790.31 and 8,716.76

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Solution

The fourth proportional to 15,790.49, 21,790.31 and 8,716.76 is: 12,028.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.49 : 21,790.31 = 8,716.76 : x
  2. Step 2: Convert to fraction form
    15,790.49/21,790.31 = 8,716.76/x
  3. Step 3: Cross multiply
    15,790.49x = 21,790.31 × 8,716.76
  4. Step 4: Simplify right side
    15,790.49x = 189,940,935.28
  5. Step 5: Solve for x
    x = 189,940,935.28/15,790.49
  6. Step 6: Final answer
    x = 12,028.82

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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.