Home / 8,455.90-12,687.81-3,775.42

Finding the Fourth Proportional to 8,455.90, 12,687.81 and 3,775.42

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Solution

The fourth proportional to 8,455.90, 12,687.81 and 3,775.42 is: 5,664.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,455.90 : 12,687.81 = 3,775.42 : x
  2. Step 2: Convert to fraction form
    8,455.90/12,687.81 = 3,775.42/x
  3. Step 3: Cross multiply
    8,455.90x = 12,687.81 × 3,775.42
  4. Step 4: Simplify right side
    8,455.90x = 47,901,811.63
  5. Step 5: Solve for x
    x = 47,901,811.63/8,455.90
  6. Step 6: Final answer
    x = 5,664.90

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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.