Home / 13,149.77-18,145.88-7,180.22

Finding the Fourth Proportional to 13,149.77, 18,145.88 and 7,180.22

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Solution

The fourth proportional to 13,149.77, 18,145.88 and 7,180.22 is: 9,908.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.77 : 18,145.88 = 7,180.22 : x
  2. Step 2: Convert to fraction form
    13,149.77/18,145.88 = 7,180.22/x
  3. Step 3: Cross multiply
    13,149.77x = 18,145.88 × 7,180.22
  4. Step 4: Simplify right side
    13,149.77x = 130,291,446.88
  5. Step 5: Solve for x
    x = 130,291,446.88/13,149.77
  6. Step 6: Final answer
    x = 9,908.27

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Half scale
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Double scale
Find fourth proportional to 13,150.77, 18,147.26 and 7,181.22
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.