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Finding the Fourth Proportional to 8,736,496.80, 13,104,745.20 and 8,240,485.20

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Solution

The fourth proportional to 8,736,496.80, 13,104,745.20 and 8,240,485.20 is: 12,360,727.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,736,496.80 : 13,104,745.20 = 8,240,485.20 : x
  2. Step 2: Convert to fraction form
    8,736,496.80/13,104,745.20 = 8,240,485.20/x
  3. Step 3: Cross multiply
    8,736,496.80x = 13,104,745.20 × 8,240,485.20
  4. Step 4: Simplify right side
    8,736,496.80x = 107,989,458,870,371.03
  5. Step 5: Solve for x
    x = 107,989,458,870,371.03/8,736,496.80
  6. Step 6: Final answer
    x = 12,360,727.80

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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.