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Finding the Fourth Proportional to 13,742,707.40, 20,614,061.10 and 12,481,958.60

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Solution

The fourth proportional to 13,742,707.40, 20,614,061.10 and 12,481,958.60 is: 18,722,937.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,742,707.40 : 20,614,061.10 = 12,481,958.60 : x
  2. Step 2: Convert to fraction form
    13,742,707.40/20,614,061.10 = 12,481,958.60/x
  3. Step 3: Cross multiply
    13,742,707.40x = 20,614,061.10 × 12,481,958.60
  4. Step 4: Simplify right side
    13,742,707.40x = 257,303,857,228,070.47
  5. Step 5: Solve for x
    x = 257,303,857,228,070.47/13,742,707.40
  6. Step 6: Final answer
    x = 18,722,937.90

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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.