Home / 13,190.09-18,202.34-7,222.12

Finding the Fourth Proportional to 13,190.09, 18,202.34 and 7,222.12

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Solution

The fourth proportional to 13,190.09, 18,202.34 and 7,222.12 is: 9,966.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,190.09 : 18,202.34 = 7,222.12 : x
  2. Step 2: Convert to fraction form
    13,190.09/18,202.34 = 7,222.12/x
  3. Step 3: Cross multiply
    13,190.09x = 18,202.34 × 7,222.12
  4. Step 4: Simplify right side
    13,190.09x = 131,459,483.76
  5. Step 5: Solve for x
    x = 131,459,483.76/13,190.09
  6. Step 6: Final answer
    x = 9,966.53

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Half scale
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Double scale
Find fourth proportional to 13,191.09, 18,203.72 and 7,223.12
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.