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Finding the Fourth Proportional to 8,615,859.64, 11,891,912.48 and 5,355,137.01

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Solution

The fourth proportional to 8,615,859.64, 11,891,912.48 and 5,355,137.01 is: 7,391,348.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615,859.64 : 11,891,912.48 = 5,355,137.01 : x
  2. Step 2: Convert to fraction form
    8,615,859.64/11,891,912.48 = 5,355,137.01/x
  3. Step 3: Cross multiply
    8,615,859.64x = 11,891,912.48 × 5,355,137.01
  4. Step 4: Simplify right side
    8,615,859.64x = 63,682,820,641,328.88
  5. Step 5: Solve for x
    x = 63,682,820,641,328.88/8,615,859.64
  6. Step 6: Final answer
    x = 7,391,348.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.