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Finding the Fourth Proportional to 48,478.60, 72,663.90 and 18,886.60

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Solution

The fourth proportional to 48,478.60, 72,663.90 and 18,886.60 is: 28,308.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,478.60 : 72,663.90 = 18,886.60 : x
  2. Step 2: Convert to fraction form
    48,478.60/72,663.90 = 18,886.60/x
  3. Step 3: Cross multiply
    48,478.60x = 72,663.90 × 18,886.60
  4. Step 4: Simplify right side
    48,478.60x = 1,372,374,013.74
  5. Step 5: Solve for x
    x = 1,372,374,013.74/48,478.60
  6. Step 6: Final answer
    x = 28,308.86

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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.