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Finding the Fourth Proportional to 21,707,978.40, 32,586,850.80 and 12,737,584.80

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Solution

The fourth proportional to 21,707,978.40, 32,586,850.80 and 12,737,584.80 is: 19,120,977.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,707,978.40 : 32,586,850.80 = 12,737,584.80 : x
  2. Step 2: Convert to fraction form
    21,707,978.40/32,586,850.80 = 12,737,584.80/x
  3. Step 3: Cross multiply
    21,707,978.40x = 32,586,850.80 × 12,737,584.80
  4. Step 4: Simplify right side
    21,707,978.40x = 415,077,775,429,947.88
  5. Step 5: Solve for x
    x = 415,077,775,429,947.88/21,707,978.40
  6. Step 6: Final answer
    x = 19,120,977.91

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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.