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Finding the Fourth Proportional to 48,390.68, 72,590.60 and 18,810.80

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Solution

The fourth proportional to 48,390.68, 72,590.60 and 18,810.80 is: 28,217.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,390.68 : 72,590.60 = 18,810.80 : x
  2. Step 2: Convert to fraction form
    48,390.68/72,590.60 = 18,810.80/x
  3. Step 3: Cross multiply
    48,390.68x = 72,590.60 × 18,810.80
  4. Step 4: Simplify right side
    48,390.68x = 1,365,487,258.48
  5. Step 5: Solve for x
    x = 1,365,487,258.48/48,390.68
  6. Step 6: Final answer
    x = 28,217.98

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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.