Home / 15,778.15-21,772.84-8,704.62

Finding the Fourth Proportional to 15,778.15, 21,772.84 and 8,704.62

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Solution

The fourth proportional to 15,778.15, 21,772.84 and 8,704.62 is: 12,011.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,778.15 : 21,772.84 = 8,704.62 : x
  2. Step 2: Convert to fraction form
    15,778.15/21,772.84 = 8,704.62/x
  3. Step 3: Cross multiply
    15,778.15x = 21,772.84 × 8,704.62
  4. Step 4: Simplify right side
    15,778.15x = 189,524,298.52
  5. Step 5: Solve for x
    x = 189,524,298.52/15,778.15
  6. Step 6: Final answer
    x = 12,011.82

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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.