Home / 13,155.18-18,153.84-7,186.86

Finding the Fourth Proportional to 13,155.18, 18,153.84 and 7,186.86

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Solution

The fourth proportional to 13,155.18, 18,153.84 and 7,186.86 is: 9,917.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.18 : 18,153.84 = 7,186.86 : x
  2. Step 2: Convert to fraction form
    13,155.18/18,153.84 = 7,186.86/x
  3. Step 3: Cross multiply
    13,155.18x = 18,153.84 × 7,186.86
  4. Step 4: Simplify right side
    13,155.18x = 130,469,106.54
  5. Step 5: Solve for x
    x = 130,469,106.54/13,155.18
  6. Step 6: Final answer
    x = 9,917.70

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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.