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Finding the Fourth Proportional to 13,978,398.59, 20,960,582.76 and 8,144,469.66

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Solution

The fourth proportional to 13,978,398.59, 20,960,582.76 and 8,144,469.66 is: 12,212,617.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,978,398.59 : 20,960,582.76 = 8,144,469.66 : x
  2. Step 2: Convert to fraction form
    13,978,398.59/20,960,582.76 = 8,144,469.66/x
  3. Step 3: Cross multiply
    13,978,398.59x = 20,960,582.76 × 8,144,469.66
  4. Step 4: Simplify right side
    13,978,398.59x = 170,712,830,344,739.06
  5. Step 5: Solve for x
    x = 170,712,830,344,739.06/13,978,398.59
  6. Step 6: Final answer
    x = 12,212,617.15

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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.