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Finding the Fourth Proportional to 18,946,818.54, 28,408,008.65 and 7,433,449.40

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Solution

The fourth proportional to 18,946,818.54, 28,408,008.65 and 7,433,449.40 is: 11,145,380.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,946,818.54 : 28,408,008.65 = 7,433,449.40 : x
  2. Step 2: Convert to fraction form
    18,946,818.54/28,408,008.65 = 7,433,449.40/x
  3. Step 3: Cross multiply
    18,946,818.54x = 28,408,008.65 × 7,433,449.40
  4. Step 4: Simplify right side
    18,946,818.54x = 211,169,494,675,330
  5. Step 5: Solve for x
    x = 211,169,494,675,330/18,946,818.54
  6. Step 6: Final answer
    x = 11,145,380.12

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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.