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Finding the Fourth Proportional to 6,620.72, 9,143.16 and 5,304.56

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Solution

The fourth proportional to 6,620.72, 9,143.16 and 5,304.56 is: 7,325.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.72 : 9,143.16 = 5,304.56 : x
  2. Step 2: Convert to fraction form
    6,620.72/9,143.16 = 5,304.56/x
  3. Step 3: Cross multiply
    6,620.72x = 9,143.16 × 5,304.56
  4. Step 4: Simplify right side
    6,620.72x = 48,500,440.81
  5. Step 5: Solve for x
    x = 48,500,440.81/6,620.72
  6. Step 6: Final answer
    x = 7,325.55

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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.