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Finding the Fourth Proportional to 12,139.34, 18,192.08 and 9,175.34

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Solution

The fourth proportional to 12,139.34, 18,192.08 and 9,175.34 is: 13,750.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.34 : 18,192.08 = 9,175.34 : x
  2. Step 2: Convert to fraction form
    12,139.34/18,192.08 = 9,175.34/x
  3. Step 3: Cross multiply
    12,139.34x = 18,192.08 × 9,175.34
  4. Step 4: Simplify right side
    12,139.34x = 166,918,519.31
  5. Step 5: Solve for x
    x = 166,918,519.31/12,139.34
  6. Step 6: Final answer
    x = 13,750.21

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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.