Home / 39,114.76-53,977.41-21,651.55

Finding the Fourth Proportional to 39,114.76, 53,977.41 and 21,651.55

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Solution

The fourth proportional to 39,114.76, 53,977.41 and 21,651.55 is: 29,878.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,114.76 : 53,977.41 = 21,651.55 : x
  2. Step 2: Convert to fraction form
    39,114.76/53,977.41 = 21,651.55/x
  3. Step 3: Cross multiply
    39,114.76x = 53,977.41 × 21,651.55
  4. Step 4: Simplify right side
    39,114.76x = 1,168,694,591.49
  5. Step 5: Solve for x
    x = 1,168,694,591.49/39,114.76
  6. Step 6: Final answer
    x = 29,878.61

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Double scale
Find fourth proportional to 39,115.76, 53,978.79 and 21,652.55
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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.