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Finding the Fourth Proportional to 62,418.72, 93,608.64 and 20,856

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Solution

The fourth proportional to 62,418.72, 93,608.64 and 20,856 is: 31,277.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,418.72 : 93,608.64 = 20,856 : x
  2. Step 2: Convert to fraction form
    62,418.72/93,608.64 = 20,856/x
  3. Step 3: Cross multiply
    62,418.72x = 93,608.64 × 20,856
  4. Step 4: Simplify right side
    62,418.72x = 1,952,301,795.84
  5. Step 5: Solve for x
    x = 1,952,301,795.84/62,418.72
  6. Step 6: Final answer
    x = 31,277.50

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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.