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Finding the Fourth Proportional to 39,693.92, 54,774.60 and 21,786.08

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Solution

The fourth proportional to 39,693.92, 54,774.60 and 21,786.08 is: 30,063.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,693.92 : 54,774.60 = 21,786.08 : x
  2. Step 2: Convert to fraction form
    39,693.92/54,774.60 = 21,786.08/x
  3. Step 3: Cross multiply
    39,693.92x = 54,774.60 × 21,786.08
  4. Step 4: Simplify right side
    39,693.92x = 1,193,323,817.57
  5. Step 5: Solve for x
    x = 1,193,323,817.57/39,693.92
  6. Step 6: Final answer
    x = 30,063.14

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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.