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Finding the Fourth Proportional to 7,713.98, 10,651.31 and 5,918.61

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Solution

The fourth proportional to 7,713.98, 10,651.31 and 5,918.61 is: 8,172.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,713.98 : 10,651.31 = 5,918.61 : x
  2. Step 2: Convert to fraction form
    7,713.98/10,651.31 = 5,918.61/x
  3. Step 3: Cross multiply
    7,713.98x = 10,651.31 × 5,918.61
  4. Step 4: Simplify right side
    7,713.98x = 63,040,985.76
  5. Step 5: Solve for x
    x = 63,040,985.76/7,713.98
  6. Step 6: Final answer
    x = 8,172.30

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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.