Home / 11,385.21-15,694.46-8,862.87

Finding the Fourth Proportional to 11,385.21, 15,694.46 and 8,862.87

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Solution

The fourth proportional to 11,385.21, 15,694.46 and 8,862.87 is: 12,217.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.21 : 15,694.46 = 8,862.87 : x
  2. Step 2: Convert to fraction form
    11,385.21/15,694.46 = 8,862.87/x
  3. Step 3: Cross multiply
    11,385.21x = 15,694.46 × 8,862.87
  4. Step 4: Simplify right side
    11,385.21x = 139,097,914.39
  5. Step 5: Solve for x
    x = 139,097,914.39/11,385.21
  6. Step 6: Final answer
    x = 12,217.42

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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.