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Finding the Fourth Proportional to 15,200,802.63, 20,978,607.94 and 8,675,408.36

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Solution

The fourth proportional to 15,200,802.63, 20,978,607.94 and 8,675,408.36 is: 11,972,919.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,200,802.63 : 20,978,607.94 = 8,675,408.36 : x
  2. Step 2: Convert to fraction form
    15,200,802.63/20,978,607.94 = 8,675,408.36/x
  3. Step 3: Cross multiply
    15,200,802.63x = 20,978,607.94 × 8,675,408.36
  4. Step 4: Simplify right side
    15,200,802.63x = 181,997,990,660,461.31
  5. Step 5: Solve for x
    x = 181,997,990,660,461.31/15,200,802.63
  6. Step 6: Final answer
    x = 11,972,919.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.