Home / 39,147.30-54,023.00-21,241.85

Finding the Fourth Proportional to 39,147.30, 54,023.00 and 21,241.85

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Solution

The fourth proportional to 39,147.30, 54,023.00 and 21,241.85 is: 29,313.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,147.30 : 54,023.00 = 21,241.85 : x
  2. Step 2: Convert to fraction form
    39,147.30/54,023.00 = 21,241.85/x
  3. Step 3: Cross multiply
    39,147.30x = 54,023.00 × 21,241.85
  4. Step 4: Simplify right side
    39,147.30x = 1,147,548,205.71
  5. Step 5: Solve for x
    x = 1,147,548,205.71/39,147.30
  6. Step 6: Final answer
    x = 29,313.60

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Half scale
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Double scale
Find fourth proportional to 39,148.30, 54,024.38 and 21,242.85
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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.