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Finding the Fourth Proportional to 48,540.40, 72,821.40 and 18,955.60

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Solution

The fourth proportional to 48,540.40, 72,821.40 and 18,955.60 is: 28,437.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,540.40 : 72,821.40 = 18,955.60 : x
  2. Step 2: Convert to fraction form
    48,540.40/72,821.40 = 18,955.60/x
  3. Step 3: Cross multiply
    48,540.40x = 72,821.40 × 18,955.60
  4. Step 4: Simplify right side
    48,540.40x = 1,380,373,329.84
  5. Step 5: Solve for x
    x = 1,380,373,329.84/48,540.40
  6. Step 6: Final answer
    x = 28,437.62

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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.