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Finding the Fourth Proportional to 7,711.90, 10,647.63 and 5,063.81

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Solution

The fourth proportional to 7,711.90, 10,647.63 and 5,063.81 is: 6,991.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,711.90 : 10,647.63 = 5,063.81 : x
  2. Step 2: Convert to fraction form
    7,711.90/10,647.63 = 5,063.81/x
  3. Step 3: Cross multiply
    7,711.90x = 10,647.63 × 5,063.81
  4. Step 4: Simplify right side
    7,711.90x = 53,917,522.03
  5. Step 5: Solve for x
    x = 53,917,522.03/7,711.90
  6. Step 6: Final answer
    x = 6,991.47

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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.