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Finding the Fourth Proportional to 9,168, 12,644.16 and 7,900.80

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Solution

The fourth proportional to 9,168, 12,644.16 and 7,900.80 is: 10,896.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,168 : 12,644.16 = 7,900.80 : x
  2. Step 2: Convert to fraction form
    9,168/12,644.16 = 7,900.80/x
  3. Step 3: Cross multiply
    9,168x = 12,644.16 × 7,900.80
  4. Step 4: Simplify right side
    9,168x = 99,898,979.33
  5. Step 5: Solve for x
    x = 99,898,979.33/9,168
  6. Step 6: Final answer
    x = 10,896.49

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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.