Home / 13,189.15-18,201.00-7,220.77

Finding the Fourth Proportional to 13,189.15, 18,201.00 and 7,220.77

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Solution

The fourth proportional to 13,189.15, 18,201.00 and 7,220.77 is: 9,964.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.15 : 18,201.00 = 7,220.77 : x
  2. Step 2: Convert to fraction form
    13,189.15/18,201.00 = 7,220.77/x
  3. Step 3: Cross multiply
    13,189.15x = 18,201.00 × 7,220.77
  4. Step 4: Simplify right side
    13,189.15x = 131,425,107.66
  5. Step 5: Solve for x
    x = 131,425,107.66/13,189.15
  6. Step 6: Final answer
    x = 9,964.64

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Half scale
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Double scale
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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.