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Finding the Fourth Proportional to 62,478.72, 93,697.56 and 20,916

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Solution

The fourth proportional to 62,478.72, 93,697.56 and 20,916 is: 31,367.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,478.72 : 93,697.56 = 20,916 : x
  2. Step 2: Convert to fraction form
    62,478.72/93,697.56 = 20,916/x
  3. Step 3: Cross multiply
    62,478.72x = 93,697.56 × 20,916
  4. Step 4: Simplify right side
    62,478.72x = 1,959,778,164.96
  5. Step 5: Solve for x
    x = 1,959,778,164.96/62,478.72
  6. Step 6: Final answer
    x = 31,367.13

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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.