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Finding the Fourth Proportional to 13,836,015.20, 20,698,035.60 and 12,156,399.20

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Solution

The fourth proportional to 13,836,015.20, 20,698,035.60 and 12,156,399.20 is: 18,185,408.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,836,015.20 : 20,698,035.60 = 12,156,399.20 : x
  2. Step 2: Convert to fraction form
    13,836,015.20/20,698,035.60 = 12,156,399.20/x
  3. Step 3: Cross multiply
    13,836,015.20x = 20,698,035.60 × 12,156,399.20
  4. Step 4: Simplify right side
    13,836,015.20x = 251,613,583,409,411.53
  5. Step 5: Solve for x
    x = 251,613,583,409,411.53/13,836,015.20
  6. Step 6: Final answer
    x = 18,185,408.14

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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.