Home / 13,203.92-18,220.20-7,613.84

Finding the Fourth Proportional to 13,203.92, 18,220.20 and 7,613.84

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Solution

The fourth proportional to 13,203.92, 18,220.20 and 7,613.84 is: 10,506.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,203.92 : 18,220.20 = 7,613.84 : x
  2. Step 2: Convert to fraction form
    13,203.92/18,220.20 = 7,613.84/x
  3. Step 3: Cross multiply
    13,203.92x = 18,220.20 × 7,613.84
  4. Step 4: Simplify right side
    13,203.92x = 138,725,687.57
  5. Step 5: Solve for x
    x = 138,725,687.57/13,203.92
  6. Step 6: Final answer
    x = 10,506.40

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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.