Home / 13,308.69-18,366.09-7,340.21

Finding the Fourth Proportional to 13,308.69, 18,366.09 and 7,340.21

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Solution

The fourth proportional to 13,308.69, 18,366.09 and 7,340.21 is: 10,129.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,308.69 : 18,366.09 = 7,340.21 : x
  2. Step 2: Convert to fraction form
    13,308.69/18,366.09 = 7,340.21/x
  3. Step 3: Cross multiply
    13,308.69x = 18,366.09 × 7,340.21
  4. Step 4: Simplify right side
    13,308.69x = 134,810,865.65
  5. Step 5: Solve for x
    x = 134,810,865.65/13,308.69
  6. Step 6: Final answer
    x = 10,129.54

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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.