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Finding the Fourth Proportional to 8,579,347.62, 12,865,092.56 and 5,122,656.54

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Solution

The fourth proportional to 8,579,347.62, 12,865,092.56 and 5,122,656.54 is: 7,681,638.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579,347.62 : 12,865,092.56 = 5,122,656.54 : x
  2. Step 2: Convert to fraction form
    8,579,347.62/12,865,092.56 = 5,122,656.54/x
  3. Step 3: Cross multiply
    8,579,347.62x = 12,865,092.56 × 5,122,656.54
  4. Step 4: Simplify right side
    8,579,347.62x = 65,903,450,540,189.34
  5. Step 5: Solve for x
    x = 65,903,450,540,189.34/8,579,347.62
  6. Step 6: Final answer
    x = 7,681,638.91

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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.