Home / 13,189.34-18,201.21-7,220.90

Finding the Fourth Proportional to 13,189.34, 18,201.21 and 7,220.90

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Solution

The fourth proportional to 13,189.34, 18,201.21 and 7,220.90 is: 9,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.34 : 18,201.21 = 7,220.90 : x
  2. Step 2: Convert to fraction form
    13,189.34/18,201.21 = 7,220.90/x
  3. Step 3: Cross multiply
    13,189.34x = 18,201.21 × 7,220.90
  4. Step 4: Simplify right side
    13,189.34x = 131,429,026.28
  5. Step 5: Solve for x
    x = 131,429,026.28/13,189.34
  6. Step 6: Final answer
    x = 9,964.80

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Double scale
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Similar ratio
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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.