Home / 39,683.42-54,763.78-21,780.09

Finding the Fourth Proportional to 39,683.42, 54,763.78 and 21,780.09

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Solution

The fourth proportional to 39,683.42, 54,763.78 and 21,780.09 is: 30,056.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,683.42 : 54,763.78 = 21,780.09 : x
  2. Step 2: Convert to fraction form
    39,683.42/54,763.78 = 21,780.09/x
  3. Step 3: Cross multiply
    39,683.42x = 54,763.78 × 21,780.09
  4. Step 4: Simplify right side
    39,683.42x = 1,192,760,057.14
  5. Step 5: Solve for x
    x = 1,192,760,057.14/39,683.42
  6. Step 6: Final answer
    x = 30,056.89

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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.