Home / 15,336.48-21,157.20-9,668.64

Finding the Fourth Proportional to 15,336.48, 21,157.20 and 9,668.64

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Solution

The fourth proportional to 15,336.48, 21,157.20 and 9,668.64 is: 13,338.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,336.48 : 21,157.20 = 9,668.64 : x
  2. Step 2: Convert to fraction form
    15,336.48/21,157.20 = 9,668.64/x
  3. Step 3: Cross multiply
    15,336.48x = 21,157.20 × 9,668.64
  4. Step 4: Simplify right side
    15,336.48x = 204,561,350.21
  5. Step 5: Solve for x
    x = 204,561,350.21/15,336.48
  6. Step 6: Final answer
    x = 13,338.22

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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.