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Finding the Fourth Proportional to 18,603,457.20, 27,903,380.40 and 5,649,719.40

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Solution

The fourth proportional to 18,603,457.20, 27,903,380.40 and 5,649,719.40 is: 8,474,030.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603,457.20 : 27,903,380.40 = 5,649,719.40 : x
  2. Step 2: Convert to fraction form
    18,603,457.20/27,903,380.40 = 5,649,719.40/x
  3. Step 3: Cross multiply
    18,603,457.20x = 27,903,380.40 × 5,649,719.40
  4. Step 4: Simplify right side
    18,603,457.20x = 157,646,269,571,459.75
  5. Step 5: Solve for x
    x = 157,646,269,571,459.75/18,603,457.20
  6. Step 6: Final answer
    x = 8,474,030.81

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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.