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Finding the Fourth Proportional to 7,191.72, 9,927.36 and 5,620.32

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Solution

The fourth proportional to 7,191.72, 9,927.36 and 5,620.32 is: 7,758.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.72 : 9,927.36 = 5,620.32 : x
  2. Step 2: Convert to fraction form
    7,191.72/9,927.36 = 5,620.32/x
  3. Step 3: Cross multiply
    7,191.72x = 9,927.36 × 5,620.32
  4. Step 4: Simplify right side
    7,191.72x = 55,794,939.96
  5. Step 5: Solve for x
    x = 55,794,939.96/7,191.72
  6. Step 6: Final answer
    x = 7,758.22

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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.