Home / 18,709,607.90-28,059,540.31-7,921,355.60

Finding the Fourth Proportional to 18,709,607.90, 28,059,540.31 and 7,921,355.60

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Solution

The fourth proportional to 18,709,607.90, 28,059,540.31 and 7,921,355.60 is: 11,879,970.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709,607.90 : 28,059,540.31 = 7,921,355.60 : x
  2. Step 2: Convert to fraction form
    18,709,607.90/28,059,540.31 = 7,921,355.60/x
  3. Step 3: Cross multiply
    18,709,607.90x = 28,059,540.31 × 7,921,355.60
  4. Step 4: Simplify right side
    18,709,607.90x = 222,269,596,768,044.22
  5. Step 5: Solve for x
    x = 222,269,596,768,044.22/18,709,607.90
  6. Step 6: Final answer
    x = 11,879,970.87

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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.