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Finding the Fourth Proportional to 8,809,381.20, 13,214,071.80 and 8,809,381.20

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Solution

The fourth proportional to 8,809,381.20, 13,214,071.80 and 8,809,381.20 is: 13,214,071.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,809,381.20 : 13,214,071.80 = 8,809,381.20 : x
  2. Step 2: Convert to fraction form
    8,809,381.20/13,214,071.80 = 8,809,381.20/x
  3. Step 3: Cross multiply
    8,809,381.20x = 13,214,071.80 × 8,809,381.20
  4. Step 4: Simplify right side
    8,809,381.20x = 116,407,795,690,370.16
  5. Step 5: Solve for x
    x = 116,407,795,690,370.16/8,809,381.20
  6. Step 6: Final answer
    x = 13,214,071.80

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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.