Home / 15,790.51-21,790.77-8,716.78

Finding the Fourth Proportional to 15,790.51, 21,790.77 and 8,716.78

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Solution

The fourth proportional to 15,790.51, 21,790.77 and 8,716.78 is: 12,029.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.51 : 21,790.77 = 8,716.78 : x
  2. Step 2: Convert to fraction form
    15,790.51/21,790.77 = 8,716.78/x
  3. Step 3: Cross multiply
    15,790.51x = 21,790.77 × 8,716.78
  4. Step 4: Simplify right side
    15,790.51x = 189,945,391.70
  5. Step 5: Solve for x
    x = 189,945,391.70/15,790.51
  6. Step 6: Final answer
    x = 12,029.08

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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.