Home / 12,113.20-18,168.90-5,091.40

Finding the Fourth Proportional to 12,113.20, 18,168.90 and 5,091.40

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Solution

The fourth proportional to 12,113.20, 18,168.90 and 5,091.40 is: 7,636.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,113.20 : 18,168.90 = 5,091.40 : x
  2. Step 2: Convert to fraction form
    12,113.20/18,168.90 = 5,091.40/x
  3. Step 3: Cross multiply
    12,113.20x = 18,168.90 × 5,091.40
  4. Step 4: Simplify right side
    12,113.20x = 92,505,137.46
  5. Step 5: Solve for x
    x = 92,505,137.46/12,113.20
  6. Step 6: Final answer
    x = 7,636.72

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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.