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Finding the Fourth Proportional to 7,200.21, 9,930.93 and 6,393.64

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Solution

The fourth proportional to 7,200.21, 9,930.93 and 6,393.64 is: 8,818.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200.21 : 9,930.93 = 6,393.64 : x
  2. Step 2: Convert to fraction form
    7,200.21/9,930.93 = 6,393.64/x
  3. Step 3: Cross multiply
    7,200.21x = 9,930.93 × 6,393.64
  4. Step 4: Simplify right side
    7,200.21x = 63,494,759.32
  5. Step 5: Solve for x
    x = 63,494,759.32/7,200.21
  6. Step 6: Final answer
    x = 8,818.46

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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.