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Finding the Fourth Proportional to 6,639.45, 9,103.04 and 6,521.00

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Solution

The fourth proportional to 6,639.45, 9,103.04 and 6,521.00 is: 8,940.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.45 : 9,103.04 = 6,521.00 : x
  2. Step 2: Convert to fraction form
    6,639.45/9,103.04 = 6,521.00/x
  3. Step 3: Cross multiply
    6,639.45x = 9,103.04 × 6,521.00
  4. Step 4: Simplify right side
    6,639.45x = 59,360,845.72
  5. Step 5: Solve for x
    x = 59,360,845.72/6,639.45
  6. Step 6: Final answer
    x = 8,940.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.