Home / 13,189.03-18,200.84-7,220.65

Finding the Fourth Proportional to 13,189.03, 18,200.84 and 7,220.65

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Solution

The fourth proportional to 13,189.03, 18,200.84 and 7,220.65 is: 9,964.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.03 : 18,200.84 = 7,220.65 : x
  2. Step 2: Convert to fraction form
    13,189.03/18,200.84 = 7,220.65/x
  3. Step 3: Cross multiply
    13,189.03x = 18,200.84 × 7,220.65
  4. Step 4: Simplify right side
    13,189.03x = 131,421,859.24
  5. Step 5: Solve for x
    x = 131,421,859.24/13,189.03
  6. Step 6: Final answer
    x = 9,964.48

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Half scale
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Double scale
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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.