Home / 15,455.20-23,168.40-12,121.60

Finding the Fourth Proportional to 15,455.20, 23,168.40 and 12,121.60

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Solution

The fourth proportional to 15,455.20, 23,168.40 and 12,121.60 is: 18,171.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.20 : 23,168.40 = 12,121.60 : x
  2. Step 2: Convert to fraction form
    15,455.20/23,168.40 = 12,121.60/x
  3. Step 3: Cross multiply
    15,455.20x = 23,168.40 × 12,121.60
  4. Step 4: Simplify right side
    15,455.20x = 280,838,077.44
  5. Step 5: Solve for x
    x = 280,838,077.44/15,455.20
  6. Step 6: Final answer
    x = 18,171.11

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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.