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Finding the Fourth Proportional to 14,644.70, 20,208.79 and 8,979.46

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Solution

The fourth proportional to 14,644.70, 20,208.79 and 8,979.46 is: 12,391.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,644.70 : 20,208.79 = 8,979.46 : x
  2. Step 2: Convert to fraction form
    14,644.70/20,208.79 = 8,979.46/x
  3. Step 3: Cross multiply
    14,644.70x = 20,208.79 × 8,979.46
  4. Step 4: Simplify right side
    14,644.70x = 181,463,982.16
  5. Step 5: Solve for x
    x = 181,463,982.16/14,644.70
  6. Step 6: Final answer
    x = 12,391.10

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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.