Home / 39,404.75-54,378.73-21,500.13

Finding the Fourth Proportional to 39,404.75, 54,378.73 and 21,500.13

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Solution

The fourth proportional to 39,404.75, 54,378.73 and 21,500.13 is: 29,670.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,404.75 : 54,378.73 = 21,500.13 : x
  2. Step 2: Convert to fraction form
    39,404.75/54,378.73 = 21,500.13/x
  3. Step 3: Cross multiply
    39,404.75x = 54,378.73 × 21,500.13
  4. Step 4: Simplify right side
    39,404.75x = 1,169,149,764.23
  5. Step 5: Solve for x
    x = 1,169,149,764.23/39,404.75
  6. Step 6: Final answer
    x = 29,670.27

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Half scale
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Double scale
Find fourth proportional to 39,405.75, 54,380.11 and 21,501.13
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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.