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Finding the Fourth Proportional to 18,421.80, 27,644.80 and 10,107.64

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Solution

The fourth proportional to 18,421.80, 27,644.80 and 10,107.64 is: 15,168.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.80 : 27,644.80 = 10,107.64 : x
  2. Step 2: Convert to fraction form
    18,421.80/27,644.80 = 10,107.64/x
  3. Step 3: Cross multiply
    18,421.80x = 27,644.80 × 10,107.64
  4. Step 4: Simplify right side
    18,421.80x = 279,423,686.27
  5. Step 5: Solve for x
    x = 279,423,686.27/18,421.80
  6. Step 6: Final answer
    x = 15,168.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.