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Finding the Fourth Proportional to 7,169,538.86, 9,893,839.04 and 3,906,380.40

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Solution

The fourth proportional to 7,169,538.86, 9,893,839.04 and 3,906,380.40 is: 5,390,737.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,169,538.86 : 9,893,839.04 = 3,906,380.40 : x
  2. Step 2: Convert to fraction form
    7,169,538.86/9,893,839.04 = 3,906,380.40/x
  3. Step 3: Cross multiply
    7,169,538.86x = 9,893,839.04 × 3,906,380.40
  4. Step 4: Simplify right side
    7,169,538.86x = 38,649,098,906,610.81
  5. Step 5: Solve for x
    x = 38,649,098,906,610.81/7,169,538.86
  6. Step 6: Final answer
    x = 5,390,737.07

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.