Home / 38,497.13-53,120.78-21,499.20

Finding the Fourth Proportional to 38,497.13, 53,120.78 and 21,499.20

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Solution

The fourth proportional to 38,497.13, 53,120.78 and 21,499.20 is: 29,665.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,497.13 : 53,120.78 = 21,499.20 : x
  2. Step 2: Convert to fraction form
    38,497.13/53,120.78 = 21,499.20/x
  3. Step 3: Cross multiply
    38,497.13x = 53,120.78 × 21,499.20
  4. Step 4: Simplify right side
    38,497.13x = 1,142,054,165.88
  5. Step 5: Solve for x
    x = 1,142,054,165.88/38,497.13
  6. Step 6: Final answer
    x = 29,665.96

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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.