Home / 11,190.12-15,440.16-7,210.65

Finding the Fourth Proportional to 11,190.12, 15,440.16 and 7,210.65

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Solution

The fourth proportional to 11,190.12, 15,440.16 and 7,210.65 is: 9,949.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,190.12 : 15,440.16 = 7,210.65 : x
  2. Step 2: Convert to fraction form
    11,190.12/15,440.16 = 7,210.65/x
  3. Step 3: Cross multiply
    11,190.12x = 15,440.16 × 7,210.65
  4. Step 4: Simplify right side
    11,190.12x = 111,333,589.70
  5. Step 5: Solve for x
    x = 111,333,589.70/11,190.12
  6. Step 6: Final answer
    x = 9,949.28

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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.