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Finding the Fourth Proportional to 7,866.88, 10,860.96 and 6,992.16

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Solution

The fourth proportional to 7,866.88, 10,860.96 and 6,992.16 is: 9,653.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,866.88 : 10,860.96 = 6,992.16 : x
  2. Step 2: Convert to fraction form
    7,866.88/10,860.96 = 6,992.16/x
  3. Step 3: Cross multiply
    7,866.88x = 10,860.96 × 6,992.16
  4. Step 4: Simplify right side
    7,866.88x = 75,941,570.07
  5. Step 5: Solve for x
    x = 75,941,570.07/7,866.88
  6. Step 6: Final answer
    x = 9,653.33

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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.