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Finding the Fourth Proportional to 6,200.39, 9,343.21 and 5,128.76

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Solution

The fourth proportional to 6,200.39, 9,343.21 and 5,128.76 is: 7,728.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,200.39 : 9,343.21 = 5,128.76 : x
  2. Step 2: Convert to fraction form
    6,200.39/9,343.21 = 5,128.76/x
  3. Step 3: Cross multiply
    6,200.39x = 9,343.21 × 5,128.76
  4. Step 4: Simplify right side
    6,200.39x = 47,919,081.72
  5. Step 5: Solve for x
    x = 47,919,081.72/6,200.39
  6. Step 6: Final answer
    x = 7,728.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.