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Finding the Fourth Proportional to 18,890,900.89, 28,338,374.31 and 5,244,104.32

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Solution

The fourth proportional to 18,890,900.89, 28,338,374.31 and 5,244,104.32 is: 7,866,718.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,890,900.89 : 28,338,374.31 = 5,244,104.32 : x
  2. Step 2: Convert to fraction form
    18,890,900.89/28,338,374.31 = 5,244,104.32/x
  3. Step 3: Cross multiply
    18,890,900.89x = 28,338,374.31 × 5,244,104.32
  4. Step 4: Simplify right side
    18,890,900.89x = 148,609,391,140,848.03
  5. Step 5: Solve for x
    x = 148,609,391,140,848.03/18,890,900.89
  6. Step 6: Final answer
    x = 7,866,718.06

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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.