Home / 13,147.69-18,143.74-7,179.36

Finding the Fourth Proportional to 13,147.69, 18,143.74 and 7,179.36

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Solution

The fourth proportional to 13,147.69, 18,143.74 and 7,179.36 is: 9,907.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.69 : 18,143.74 = 7,179.36 : x
  2. Step 2: Convert to fraction form
    13,147.69/18,143.74 = 7,179.36/x
  3. Step 3: Cross multiply
    13,147.69x = 18,143.74 × 7,179.36
  4. Step 4: Simplify right side
    13,147.69x = 130,260,441.21
  5. Step 5: Solve for x
    x = 130,260,441.21/13,147.69
  6. Step 6: Final answer
    x = 9,907.48

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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.