Home / 13,155.20-18,153.94-7,186.71

Finding the Fourth Proportional to 13,155.20, 18,153.94 and 7,186.71

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Solution

The fourth proportional to 13,155.20, 18,153.94 and 7,186.71 is: 9,917.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.20 : 18,153.94 = 7,186.71 : x
  2. Step 2: Convert to fraction form
    13,155.20/18,153.94 = 7,186.71/x
  3. Step 3: Cross multiply
    13,155.20x = 18,153.94 × 7,186.71
  4. Step 4: Simplify right side
    13,155.20x = 130,467,102.14
  5. Step 5: Solve for x
    x = 130,467,102.14/13,155.20
  6. Step 6: Final answer
    x = 9,917.53

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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.