Home / 39,682.85-54,762.16-21,778.15

Finding the Fourth Proportional to 39,682.85, 54,762.16 and 21,778.15

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Solution

The fourth proportional to 39,682.85, 54,762.16 and 21,778.15 is: 30,053.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,682.85 : 54,762.16 = 21,778.15 : x
  2. Step 2: Convert to fraction form
    39,682.85/54,762.16 = 21,778.15/x
  3. Step 3: Cross multiply
    39,682.85x = 54,762.16 × 21,778.15
  4. Step 4: Simplify right side
    39,682.85x = 1,192,618,260.99
  5. Step 5: Solve for x
    x = 1,192,618,260.99/39,682.85
  6. Step 6: Final answer
    x = 30,053.75

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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.