Home / 13,191.30-18,203.58-7,222.86

Finding the Fourth Proportional to 13,191.30, 18,203.58 and 7,222.86

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Solution

The fourth proportional to 13,191.30, 18,203.58 and 7,222.86 is: 9,967.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.30 : 18,203.58 = 7,222.86 : x
  2. Step 2: Convert to fraction form
    13,191.30/18,203.58 = 7,222.86/x
  3. Step 3: Cross multiply
    13,191.30x = 18,203.58 × 7,222.86
  4. Step 4: Simplify right side
    13,191.30x = 131,481,909.84
  5. Step 5: Solve for x
    x = 131,481,909.84/13,191.30
  6. Step 6: Final answer
    x = 9,967.32

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Half scale
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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.