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Finding the Fourth Proportional to 12,755.40, 19,133.10 and 12,496.20

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Solution

The fourth proportional to 12,755.40, 19,133.10 and 12,496.20 is: 18,744.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,755.40 : 19,133.10 = 12,496.20 : x
  2. Step 2: Convert to fraction form
    12,755.40/19,133.10 = 12,496.20/x
  3. Step 3: Cross multiply
    12,755.40x = 19,133.10 × 12,496.20
  4. Step 4: Simplify right side
    12,755.40x = 239,091,044.22
  5. Step 5: Solve for x
    x = 239,091,044.22/12,755.40
  6. Step 6: Final answer
    x = 18,744.30

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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.