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Finding the Fourth Proportional to 12,651,028.56, 18,978,397.61 and 4,012,247.88

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Solution

The fourth proportional to 12,651,028.56, 18,978,397.61 and 4,012,247.88 is: 6,018,960.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651,028.56 : 18,978,397.61 = 4,012,247.88 : x
  2. Step 2: Convert to fraction form
    12,651,028.56/18,978,397.61 = 4,012,247.88/x
  3. Step 3: Cross multiply
    12,651,028.56x = 18,978,397.61 × 4,012,247.88
  4. Step 4: Simplify right side
    12,651,028.56x = 76,146,035,556,458.33
  5. Step 5: Solve for x
    x = 76,146,035,556,458.33/12,651,028.56
  6. Step 6: Final answer
    x = 6,018,960.05

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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.