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Finding the Fourth Proportional to 7,911.93, 10,918.11 and 4,326.79

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Solution

The fourth proportional to 7,911.93, 10,918.11 and 4,326.79 is: 5,970.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.93 : 10,918.11 = 4,326.79 : x
  2. Step 2: Convert to fraction form
    7,911.93/10,918.11 = 4,326.79/x
  3. Step 3: Cross multiply
    7,911.93x = 10,918.11 × 4,326.79
  4. Step 4: Simplify right side
    7,911.93x = 47,240,369.17
  5. Step 5: Solve for x
    x = 47,240,369.17/7,911.93
  6. Step 6: Final answer
    x = 5,970.78

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1.5x scale

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.