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Finding the Fourth Proportional to 13,970,046.20, 20,955,069.30 and 12,290,430.20

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Solution

The fourth proportional to 13,970,046.20, 20,955,069.30 and 12,290,430.20 is: 18,435,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,970,046.20 : 20,955,069.30 = 12,290,430.20 : x
  2. Step 2: Convert to fraction form
    13,970,046.20/20,955,069.30 = 12,290,430.20/x
  3. Step 3: Cross multiply
    13,970,046.20x = 20,955,069.30 × 12,290,430.20
  4. Step 4: Simplify right side
    13,970,046.20x = 257,546,816,567,812.84
  5. Step 5: Solve for x
    x = 257,546,816,567,812.84/13,970,046.20
  6. Step 6: Final answer
    x = 18,435,645.30

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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.