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Finding the Fourth Proportional to 7,218,894.86, 9,961,903.01 and 3,955,551.87

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Solution

The fourth proportional to 7,218,894.86, 9,961,903.01 and 3,955,551.87 is: 5,458,567.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218,894.86 : 9,961,903.01 = 3,955,551.87 : x
  2. Step 2: Convert to fraction form
    7,218,894.86/9,961,903.01 = 3,955,551.87/x
  3. Step 3: Cross multiply
    7,218,894.86x = 9,961,903.01 × 3,955,551.87
  4. Step 4: Simplify right side
    7,218,894.86x = 39,404,824,104,960.16
  5. Step 5: Solve for x
    x = 39,404,824,104,960.16/7,218,894.86
  6. Step 6: Final answer
    x = 5,458,567.40

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Why These Related Problems?

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