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Finding the Fourth Proportional to 18,965,213.96, 28,447,894.74 and 4,588,258.68

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Solution

The fourth proportional to 18,965,213.96, 28,447,894.74 and 4,588,258.68 is: 6,882,405.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965,213.96 : 28,447,894.74 = 4,588,258.68 : x
  2. Step 2: Convert to fraction form
    18,965,213.96/28,447,894.74 = 4,588,258.68/x
  3. Step 3: Cross multiply
    18,965,213.96x = 28,447,894.74 × 4,588,258.68
  4. Step 4: Simplify right side
    18,965,213.96x = 130,526,299,968,531.33
  5. Step 5: Solve for x
    x = 130,526,299,968,531.33/18,965,213.96
  6. Step 6: Final answer
    x = 6,882,405.88

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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.