Home / 13,155.76-18,149.04-8,120.19

Finding the Fourth Proportional to 13,155.76, 18,149.04 and 8,120.19

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Solution

The fourth proportional to 13,155.76, 18,149.04 and 8,120.19 is: 11,202.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.76 : 18,149.04 = 8,120.19 : x
  2. Step 2: Convert to fraction form
    13,155.76/18,149.04 = 8,120.19/x
  3. Step 3: Cross multiply
    13,155.76x = 18,149.04 × 8,120.19
  4. Step 4: Simplify right side
    13,155.76x = 147,373,721.18
  5. Step 5: Solve for x
    x = 147,373,721.18/13,155.76
  6. Step 6: Final answer
    x = 11,202.22

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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.