Home / 21,043.82-29,078.98-20,018.77

Finding the Fourth Proportional to 21,043.82, 29,078.98 and 20,018.77

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Solution

The fourth proportional to 21,043.82, 29,078.98 and 20,018.77 is: 27,662.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.82 : 29,078.98 = 20,018.77 : x
  2. Step 2: Convert to fraction form
    21,043.82/29,078.98 = 20,018.77/x
  3. Step 3: Cross multiply
    21,043.82x = 29,078.98 × 20,018.77
  4. Step 4: Simplify right side
    21,043.82x = 582,125,289.71
  5. Step 5: Solve for x
    x = 582,125,289.71/21,043.82
  6. Step 6: Final answer
    x = 27,662.53

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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.