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Finding the Fourth Proportional to 8,612,491.48, 12,918,307.74 and 3,220,745.48

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Solution

The fourth proportional to 8,612,491.48, 12,918,307.74 and 3,220,745.48 is: 4,830,957.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612,491.48 : 12,918,307.74 = 3,220,745.48 : x
  2. Step 2: Convert to fraction form
    8,612,491.48/12,918,307.74 = 3,220,745.48/x
  3. Step 3: Cross multiply
    8,612,491.48x = 12,918,307.74 × 3,220,745.48
  4. Step 4: Simplify right side
    8,612,491.48x = 41,606,581,262,854.02
  5. Step 5: Solve for x
    x = 41,606,581,262,854.02/8,612,491.48
  6. Step 6: Final answer
    x = 4,830,957.61

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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.