Home / 11,420.10-17,166.60-8,155.80

Finding the Fourth Proportional to 11,420.10, 17,166.60 and 8,155.80

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Solution

The fourth proportional to 11,420.10, 17,166.60 and 8,155.80 is: 12,259.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,420.10 : 17,166.60 = 8,155.80 : x
  2. Step 2: Convert to fraction form
    11,420.10/17,166.60 = 8,155.80/x
  3. Step 3: Cross multiply
    11,420.10x = 17,166.60 × 8,155.80
  4. Step 4: Simplify right side
    11,420.10x = 140,007,356.28
  5. Step 5: Solve for x
    x = 140,007,356.28/11,420.10
  6. Step 6: Final answer
    x = 12,259.73

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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.