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Finding the Fourth Proportional to 8,603,645.49, 12,905,468.64 and 3,212,716.86

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Solution

The fourth proportional to 8,603,645.49, 12,905,468.64 and 3,212,716.86 is: 4,819,075.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603,645.49 : 12,905,468.64 = 3,212,716.86 : x
  2. Step 2: Convert to fraction form
    8,603,645.49/12,905,468.64 = 3,212,716.86/x
  3. Step 3: Cross multiply
    8,603,645.49x = 12,905,468.64 × 3,212,716.86
  4. Step 4: Simplify right side
    8,603,645.49x = 41,461,616,685,929.27
  5. Step 5: Solve for x
    x = 41,461,616,685,929.27/8,603,645.49
  6. Step 6: Final answer
    x = 4,819,075.44

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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.