Home / 13,155.17-18,153.83-7,186.87

Finding the Fourth Proportional to 13,155.17, 18,153.83 and 7,186.87

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Solution

The fourth proportional to 13,155.17, 18,153.83 and 7,186.87 is: 9,917.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.17 : 18,153.83 = 7,186.87 : x
  2. Step 2: Convert to fraction form
    13,155.17/18,153.83 = 7,186.87/x
  3. Step 3: Cross multiply
    13,155.17x = 18,153.83 × 7,186.87
  4. Step 4: Simplify right side
    13,155.17x = 130,469,216.21
  5. Step 5: Solve for x
    x = 130,469,216.21/13,155.17
  6. Step 6: Final answer
    x = 9,917.71

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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.