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Finding the Fourth Proportional to 6,640,878.21, 9,938,818.42 and 4,083,712.82

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Solution

The fourth proportional to 6,640,878.21, 9,938,818.42 and 4,083,712.82 is: 6,111,733.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640,878.21 : 9,938,818.42 = 4,083,712.82 : x
  2. Step 2: Convert to fraction form
    6,640,878.21/9,938,818.42 = 4,083,712.82/x
  3. Step 3: Cross multiply
    6,640,878.21x = 9,938,818.42 × 4,083,712.82
  4. Step 4: Simplify right side
    6,640,878.21x = 40,587,280,127,293.48
  5. Step 5: Solve for x
    x = 40,587,280,127,293.48/6,640,878.21
  6. Step 6: Final answer
    x = 6,111,733.85

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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.