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Finding the Fourth Proportional to 8,142,389.80, 11,384,415.80 and 8,142,389.80

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Solution

The fourth proportional to 8,142,389.80, 11,384,415.80 and 8,142,389.80 is: 11,384,415.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,142,389.80 : 11,384,415.80 = 8,142,389.80 : x
  2. Step 2: Convert to fraction form
    8,142,389.80/11,384,415.80 = 8,142,389.80/x
  3. Step 3: Cross multiply
    8,142,389.80x = 11,384,415.80 × 8,142,389.80
  4. Step 4: Simplify right side
    8,142,389.80x = 92,696,351,088,878.84
  5. Step 5: Solve for x
    x = 92,696,351,088,878.84/8,142,389.80
  6. Step 6: Final answer
    x = 11,384,415.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.