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Finding the Fourth Proportional to 13,810,487.20, 20,715,730.80 and 8,784,080.80

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Solution

The fourth proportional to 13,810,487.20, 20,715,730.80 and 8,784,080.80 is: 13,176,121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,810,487.20 : 20,715,730.80 = 8,784,080.80 : x
  2. Step 2: Convert to fraction form
    13,810,487.20/20,715,730.80 = 8,784,080.80/x
  3. Step 3: Cross multiply
    13,810,487.20x = 20,715,730.80 × 8,784,080.80
  4. Step 4: Simplify right side
    13,810,487.20x = 181,968,653,178,248.66
  5. Step 5: Solve for x
    x = 181,968,653,178,248.66/13,810,487.20
  6. Step 6: Final answer
    x = 13,176,121.20

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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.