Home / 39,683.93-54,765.81-21,778.79

Finding the Fourth Proportional to 39,683.93, 54,765.81 and 21,778.79

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Solution

The fourth proportional to 39,683.93, 54,765.81 and 21,778.79 is: 30,055.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,683.93 : 54,765.81 = 21,778.79 : x
  2. Step 2: Convert to fraction form
    39,683.93/54,765.81 = 21,778.79/x
  3. Step 3: Cross multiply
    39,683.93x = 54,765.81 × 21,778.79
  4. Step 4: Simplify right side
    39,683.93x = 1,192,732,801.34
  5. Step 5: Solve for x
    x = 1,192,732,801.34/39,683.93
  6. Step 6: Final answer
    x = 30,055.82

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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.