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Finding the Fourth Proportional to 13,318,746.13, 19,978,679.73 and 4,221,202.71

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Solution

The fourth proportional to 13,318,746.13, 19,978,679.73 and 4,221,202.71 is: 6,331,981.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318,746.13 : 19,978,679.73 = 4,221,202.71 : x
  2. Step 2: Convert to fraction form
    13,318,746.13/19,978,679.73 = 4,221,202.71/x
  3. Step 3: Cross multiply
    13,318,746.13x = 19,978,679.73 × 4,221,202.71
  4. Step 4: Simplify right side
    13,318,746.13x = 84,334,057,109,247.62
  5. Step 5: Solve for x
    x = 84,334,057,109,247.62/13,318,746.13
  6. Step 6: Final answer
    x = 6,331,981.73

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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.