Home / 15,500.68-21,390.49-8,786.93

Finding the Fourth Proportional to 15,500.68, 21,390.49 and 8,786.93

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Solution

The fourth proportional to 15,500.68, 21,390.49 and 8,786.93 is: 12,125.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,500.68 : 21,390.49 = 8,786.93 : x
  2. Step 2: Convert to fraction form
    15,500.68/21,390.49 = 8,786.93/x
  3. Step 3: Cross multiply
    15,500.68x = 21,390.49 × 8,786.93
  4. Step 4: Simplify right side
    15,500.68x = 187,956,738.30
  5. Step 5: Solve for x
    x = 187,956,738.30/15,500.68
  6. Step 6: Final answer
    x = 12,125.71

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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.