Home / 21,215.73-29,276.56-11,783.69

Finding the Fourth Proportional to 21,215.73, 29,276.56 and 11,783.69

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Solution

The fourth proportional to 21,215.73, 29,276.56 and 11,783.69 is: 16,260.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.73 : 29,276.56 = 11,783.69 : x
  2. Step 2: Convert to fraction form
    21,215.73/29,276.56 = 11,783.69/x
  3. Step 3: Cross multiply
    21,215.73x = 29,276.56 × 11,783.69
  4. Step 4: Simplify right side
    21,215.73x = 344,985,907.31
  5. Step 5: Solve for x
    x = 344,985,907.31/21,215.73
  6. Step 6: Final answer
    x = 16,260.85

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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.