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Finding the Fourth Proportional to 52,825.62, 79,240.86 and 21,639

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Solution

The fourth proportional to 52,825.62, 79,240.86 and 21,639 is: 32,459.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,825.62 : 79,240.86 = 21,639 : x
  2. Step 2: Convert to fraction form
    52,825.62/79,240.86 = 21,639/x
  3. Step 3: Cross multiply
    52,825.62x = 79,240.86 × 21,639
  4. Step 4: Simplify right side
    52,825.62x = 1,714,692,969.54
  5. Step 5: Solve for x
    x = 1,714,692,969.54/52,825.62
  6. Step 6: Final answer
    x = 32,459.50

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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.