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Finding the Fourth Proportional to 62,483.72, 93,705.96 and 20,921

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Solution

The fourth proportional to 62,483.72, 93,705.96 and 20,921 is: 31,374.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,483.72 : 93,705.96 = 20,921 : x
  2. Step 2: Convert to fraction form
    62,483.72/93,705.96 = 20,921/x
  3. Step 3: Cross multiply
    62,483.72x = 93,705.96 × 20,921
  4. Step 4: Simplify right side
    62,483.72x = 1,960,422,389.16
  5. Step 5: Solve for x
    x = 1,960,422,389.16/62,483.72
  6. Step 6: Final answer
    x = 31,374.93

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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.