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Finding the Fourth Proportional to 62,484.72, 93,736.80 and 20,922

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Solution

The fourth proportional to 62,484.72, 93,736.80 and 20,922 is: 31,386.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,484.72 : 93,736.80 = 20,922 : x
  2. Step 2: Convert to fraction form
    62,484.72/93,736.80 = 20,922/x
  3. Step 3: Cross multiply
    62,484.72x = 93,736.80 × 20,922
  4. Step 4: Simplify right side
    62,484.72x = 1,961,161,329.60
  5. Step 5: Solve for x
    x = 1,961,161,329.60/62,484.72
  6. Step 6: Final answer
    x = 31,386.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.