Home / 15,790.75-21,790.20-8,717.11

Finding the Fourth Proportional to 15,790.75, 21,790.20 and 8,717.11

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Solution

The fourth proportional to 15,790.75, 21,790.20 and 8,717.11 is: 12,029.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.75 : 21,790.20 = 8,717.11 : x
  2. Step 2: Convert to fraction form
    15,790.75/21,790.20 = 8,717.11/x
  3. Step 3: Cross multiply
    15,790.75x = 21,790.20 × 8,717.11
  4. Step 4: Simplify right side
    15,790.75x = 189,947,570.32
  5. Step 5: Solve for x
    x = 189,947,570.32/15,790.75
  6. Step 6: Final answer
    x = 12,029.04

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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.