Home / 8,520.22-12,780.45-3,837.78

Finding the Fourth Proportional to 8,520.22, 12,780.45 and 3,837.78

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Solution

The fourth proportional to 8,520.22, 12,780.45 and 3,837.78 is: 5,756.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.22 : 12,780.45 = 3,837.78 : x
  2. Step 2: Convert to fraction form
    8,520.22/12,780.45 = 3,837.78/x
  3. Step 3: Cross multiply
    8,520.22x = 12,780.45 × 3,837.78
  4. Step 4: Simplify right side
    8,520.22x = 49,048,555.40
  5. Step 5: Solve for x
    x = 49,048,555.40/8,520.22
  6. Step 6: Final answer
    x = 5,756.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.