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Finding the Fourth Proportional to 7,963.94, 10,989.81 and 4,427.08

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Solution

The fourth proportional to 7,963.94, 10,989.81 and 4,427.08 is: 6,109.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,963.94 : 10,989.81 = 4,427.08 : x
  2. Step 2: Convert to fraction form
    7,963.94/10,989.81 = 4,427.08/x
  3. Step 3: Cross multiply
    7,963.94x = 10,989.81 × 4,427.08
  4. Step 4: Simplify right side
    7,963.94x = 48,652,740.58
  5. Step 5: Solve for x
    x = 48,652,740.58/7,963.94
  6. Step 6: Final answer
    x = 6,109.13

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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.