Home / 39,683.36-54,763.71-21,780.03

Finding the Fourth Proportional to 39,683.36, 54,763.71 and 21,780.03

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Solution

The fourth proportional to 39,683.36, 54,763.71 and 21,780.03 is: 30,056.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,683.36 : 54,763.71 = 21,780.03 : x
  2. Step 2: Convert to fraction form
    39,683.36/54,763.71 = 21,780.03/x
  3. Step 3: Cross multiply
    39,683.36x = 54,763.71 × 21,780.03
  4. Step 4: Simplify right side
    39,683.36x = 1,192,754,959.67
  5. Step 5: Solve for x
    x = 1,192,754,959.67/39,683.36
  6. Step 6: Final answer
    x = 30,056.81

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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.