Home / 18,891.36-28,332.86-11,469.20

Finding the Fourth Proportional to 18,891.36, 28,332.86 and 11,469.20

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Solution

The fourth proportional to 18,891.36, 28,332.86 and 11,469.20 is: 17,201.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.36 : 28,332.86 = 11,469.20 : x
  2. Step 2: Convert to fraction form
    18,891.36/28,332.86 = 11,469.20/x
  3. Step 3: Cross multiply
    18,891.36x = 28,332.86 × 11,469.20
  4. Step 4: Simplify right side
    18,891.36x = 324,955,038.90
  5. Step 5: Solve for x
    x = 324,955,038.90/18,891.36
  6. Step 6: Final answer
    x = 17,201.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.