Home / 8,815.90-12,155.25-6,453.94

Finding the Fourth Proportional to 8,815.90, 12,155.25 and 6,453.94

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Solution

The fourth proportional to 8,815.90, 12,155.25 and 6,453.94 is: 8,898.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.90 : 12,155.25 = 6,453.94 : x
  2. Step 2: Convert to fraction form
    8,815.90/12,155.25 = 6,453.94/x
  3. Step 3: Cross multiply
    8,815.90x = 12,155.25 × 6,453.94
  4. Step 4: Simplify right side
    8,815.90x = 78,449,254.19
  5. Step 5: Solve for x
    x = 78,449,254.19/8,815.90
  6. Step 6: Final answer
    x = 8,898.61

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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.