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Finding the Fourth Proportional to 8,662,541.76, 12,989,331.72 and 3,802,859.28

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Solution

The fourth proportional to 8,662,541.76, 12,989,331.72 and 3,802,859.28 is: 5,702,321.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,662,541.76 : 12,989,331.72 = 3,802,859.28 : x
  2. Step 2: Convert to fraction form
    8,662,541.76/12,989,331.72 = 3,802,859.28/x
  3. Step 3: Cross multiply
    8,662,541.76x = 12,989,331.72 × 3,802,859.28
  4. Step 4: Simplify right side
    8,662,541.76x = 49,396,600,672,400.36
  5. Step 5: Solve for x
    x = 49,396,600,672,400.36/8,662,541.76
  6. Step 6: Final answer
    x = 5,702,321.79

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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.