Home / 13,117.69-18,102.62-7,149.36

Finding the Fourth Proportional to 13,117.69, 18,102.62 and 7,149.36

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Solution

The fourth proportional to 13,117.69, 18,102.62 and 7,149.36 is: 9,866.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.69 : 18,102.62 = 7,149.36 : x
  2. Step 2: Convert to fraction form
    13,117.69/18,102.62 = 7,149.36/x
  3. Step 3: Cross multiply
    13,117.69x = 18,102.62 × 7,149.36
  4. Step 4: Simplify right side
    13,117.69x = 129,422,147.32
  5. Step 5: Solve for x
    x = 129,422,147.32/13,117.69
  6. Step 6: Final answer
    x = 9,866.23

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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.