Home / 13,191.09-18,203.63-7,222.65

Finding the Fourth Proportional to 13,191.09, 18,203.63 and 7,222.65

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Solution

The fourth proportional to 13,191.09, 18,203.63 and 7,222.65 is: 9,967.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.09 : 18,203.63 = 7,222.65 : x
  2. Step 2: Convert to fraction form
    13,191.09/18,203.63 = 7,222.65/x
  3. Step 3: Cross multiply
    13,191.09x = 18,203.63 × 7,222.65
  4. Step 4: Simplify right side
    13,191.09x = 131,478,448.22
  5. Step 5: Solve for x
    x = 131,478,448.22/13,191.09
  6. Step 6: Final answer
    x = 9,967.22

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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.