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Finding the Fourth Proportional to 13,773,681.20, 20,660,521.80 and 11,647,917.20

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Solution

The fourth proportional to 13,773,681.20, 20,660,521.80 and 11,647,917.20 is: 17,471,875.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,773,681.20 : 20,660,521.80 = 11,647,917.20 : x
  2. Step 2: Convert to fraction form
    13,773,681.20/20,660,521.80 = 11,647,917.20/x
  3. Step 3: Cross multiply
    13,773,681.20x = 20,660,521.80 × 11,647,917.20
  4. Step 4: Simplify right side
    13,773,681.20x = 240,652,047,235,194.97
  5. Step 5: Solve for x
    x = 240,652,047,235,194.97/13,773,681.20
  6. Step 6: Final answer
    x = 17,471,875.80

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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.