Home / 39,896.15-55,059.15-21,991.12

Finding the Fourth Proportional to 39,896.15, 55,059.15 and 21,991.12

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Solution

The fourth proportional to 39,896.15, 55,059.15 and 21,991.12 is: 30,349.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,896.15 : 55,059.15 = 21,991.12 : x
  2. Step 2: Convert to fraction form
    39,896.15/55,059.15 = 21,991.12/x
  3. Step 3: Cross multiply
    39,896.15x = 55,059.15 × 21,991.12
  4. Step 4: Simplify right side
    39,896.15x = 1,210,812,319.57
  5. Step 5: Solve for x
    x = 1,210,812,319.57/39,896.15
  6. Step 6: Final answer
    x = 30,349.10

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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.