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Finding the Fourth Proportional to 7,111.76, 9,813 and 4,126.92

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Solution

The fourth proportional to 7,111.76, 9,813 and 4,126.92 is: 5,694.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.76 : 9,813 = 4,126.92 : x
  2. Step 2: Convert to fraction form
    7,111.76/9,813 = 4,126.92/x
  3. Step 3: Cross multiply
    7,111.76x = 9,813 × 4,126.92
  4. Step 4: Simplify right side
    7,111.76x = 40,497,465.96
  5. Step 5: Solve for x
    x = 40,497,465.96/7,111.76
  6. Step 6: Final answer
    x = 5,694.44

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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.