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Finding the Fourth Proportional to 7,689.36, 10,616.21 and 6,276.41

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Solution

The fourth proportional to 7,689.36, 10,616.21 and 6,276.41 is: 8,665.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,689.36 : 10,616.21 = 6,276.41 : x
  2. Step 2: Convert to fraction form
    7,689.36/10,616.21 = 6,276.41/x
  3. Step 3: Cross multiply
    7,689.36x = 10,616.21 × 6,276.41
  4. Step 4: Simplify right side
    7,689.36x = 66,631,730.65
  5. Step 5: Solve for x
    x = 66,631,730.65/7,689.36
  6. Step 6: Final answer
    x = 8,665.45

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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.