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Finding the Fourth Proportional to 7,111.56, 9,813.78 and 4,127.64

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Solution

The fourth proportional to 7,111.56, 9,813.78 and 4,127.64 is: 5,696.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.56 : 9,813.78 = 4,127.64 : x
  2. Step 2: Convert to fraction form
    7,111.56/9,813.78 = 4,127.64/x
  3. Step 3: Cross multiply
    7,111.56x = 9,813.78 × 4,127.64
  4. Step 4: Simplify right side
    7,111.56x = 40,507,750.88
  5. Step 5: Solve for x
    x = 40,507,750.88/7,111.56
  6. Step 6: Final answer
    x = 5,696.04

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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.