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Finding the Fourth Proportional to 12,911.63, 17,818.04 and 7,322.63

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Solution

The fourth proportional to 12,911.63, 17,818.04 and 7,322.63 is: 10,105.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.63 : 17,818.04 = 7,322.63 : x
  2. Step 2: Convert to fraction form
    12,911.63/17,818.04 = 7,322.63/x
  3. Step 3: Cross multiply
    12,911.63x = 17,818.04 × 7,322.63
  4. Step 4: Simplify right side
    12,911.63x = 130,474,843.46
  5. Step 5: Solve for x
    x = 130,474,843.46/12,911.63
  6. Step 6: Final answer
    x = 10,105.22

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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.