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Finding the Fourth Proportional to 18,064.63, 27,138.48 and 12,812.64

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Solution

The fourth proportional to 18,064.63, 27,138.48 and 12,812.64 is: 19,248.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,064.63 : 27,138.48 = 12,812.64 : x
  2. Step 2: Convert to fraction form
    18,064.63/27,138.48 = 12,812.64/x
  3. Step 3: Cross multiply
    18,064.63x = 27,138.48 × 12,812.64
  4. Step 4: Simplify right side
    18,064.63x = 347,715,574.39
  5. Step 5: Solve for x
    x = 347,715,574.39/18,064.63
  6. Step 6: Final answer
    x = 19,248.42

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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.