Home / 13,189.76-18,201.15-7,220.27

Finding the Fourth Proportional to 13,189.76, 18,201.15 and 7,220.27

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Solution

The fourth proportional to 13,189.76, 18,201.15 and 7,220.27 is: 9,963.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.76 : 18,201.15 = 7,220.27 : x
  2. Step 2: Convert to fraction form
    13,189.76/18,201.15 = 7,220.27/x
  3. Step 3: Cross multiply
    13,189.76x = 18,201.15 × 7,220.27
  4. Step 4: Simplify right side
    13,189.76x = 131,417,262.81
  5. Step 5: Solve for x
    x = 131,417,262.81/13,189.76
  6. Step 6: Final answer
    x = 9,963.58

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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.