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Finding the Fourth Proportional to 13,670,603.80, 20,505,905.70 and 13,458,027.40

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Solution

The fourth proportional to 13,670,603.80, 20,505,905.70 and 13,458,027.40 is: 20,187,041.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670,603.80 : 20,505,905.70 = 13,458,027.40 : x
  2. Step 2: Convert to fraction form
    13,670,603.80/20,505,905.70 = 13,458,027.40/x
  3. Step 3: Cross multiply
    13,670,603.80x = 20,505,905.70 × 13,458,027.40
  4. Step 4: Simplify right side
    13,670,603.80x = 275,969,040,772,416.19
  5. Step 5: Solve for x
    x = 275,969,040,772,416.19/13,670,603.80
  6. Step 6: Final answer
    x = 20,187,041.10

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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.