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Finding the Fourth Proportional to 18,787,311.71, 28,181,711.88 and 8,937,009.03

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Solution

The fourth proportional to 18,787,311.71, 28,181,711.88 and 8,937,009.03 is: 13,405,867.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787,311.71 : 28,181,711.88 = 8,937,009.03 : x
  2. Step 2: Convert to fraction form
    18,787,311.71/28,181,711.88 = 8,937,009.03/x
  3. Step 3: Cross multiply
    18,787,311.71x = 28,181,711.88 × 8,937,009.03
  4. Step 4: Simplify right side
    18,787,311.71x = 251,860,213,552,418.25
  5. Step 5: Solve for x
    x = 251,860,213,552,418.25/18,787,311.71
  6. Step 6: Final answer
    x = 13,405,867.61

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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.