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Finding the Fourth Proportional to 18,932,310.80, 28,398,466.20 and 15,573,078.80

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Solution

The fourth proportional to 18,932,310.80, 28,398,466.20 and 15,573,078.80 is: 23,359,618.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,932,310.80 : 28,398,466.20 = 15,573,078.80 : x
  2. Step 2: Convert to fraction form
    18,932,310.80/28,398,466.20 = 15,573,078.80/x
  3. Step 3: Cross multiply
    18,932,310.80x = 28,398,466.20 × 15,573,078.80
  4. Step 4: Simplify right side
    18,932,310.80x = 442,251,551,931,736.56
  5. Step 5: Solve for x
    x = 442,251,551,931,736.56/18,932,310.80
  6. Step 6: Final answer
    x = 23,359,618.20

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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.