Home / 39,683.59-54,761.63-21,778.90

Finding the Fourth Proportional to 39,683.59, 54,761.63 and 21,778.90

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Solution

The fourth proportional to 39,683.59, 54,761.63 and 21,778.90 is: 30,053.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,683.59 : 54,761.63 = 21,778.90 : x
  2. Step 2: Convert to fraction form
    39,683.59/54,761.63 = 21,778.90/x
  3. Step 3: Cross multiply
    39,683.59x = 54,761.63 × 21,778.90
  4. Step 4: Simplify right side
    39,683.59x = 1,192,647,817.81
  5. Step 5: Solve for x
    x = 1,192,647,817.81/39,683.59
  6. Step 6: Final answer
    x = 30,053.93

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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.