Home / 13,228.13-18,255.39-7,921.93

Finding the Fourth Proportional to 13,228.13, 18,255.39 and 7,921.93

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Solution

The fourth proportional to 13,228.13, 18,255.39 and 7,921.93 is: 10,932.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,228.13 : 18,255.39 = 7,921.93 : x
  2. Step 2: Convert to fraction form
    13,228.13/18,255.39 = 7,921.93/x
  3. Step 3: Cross multiply
    13,228.13x = 18,255.39 × 7,921.93
  4. Step 4: Simplify right side
    13,228.13x = 144,617,921.70
  5. Step 5: Solve for x
    x = 144,617,921.70/13,228.13
  6. Step 6: Final answer
    x = 10,932.61

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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.