Home / 39,683.22-54,763.91-21,778.86

Finding the Fourth Proportional to 39,683.22, 54,763.91 and 21,778.86

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Solution

The fourth proportional to 39,683.22, 54,763.91 and 21,778.86 is: 30,055.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,683.22 : 54,763.91 = 21,778.86 : x
  2. Step 2: Convert to fraction form
    39,683.22/54,763.91 = 21,778.86/x
  3. Step 3: Cross multiply
    39,683.22x = 54,763.91 × 21,778.86
  4. Step 4: Simplify right side
    39,683.22x = 1,192,695,528.94
  5. Step 5: Solve for x
    x = 1,192,695,528.94/39,683.22
  6. Step 6: Final answer
    x = 30,055.41

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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.