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Finding the Fourth Proportional to 12,305.17, 18,435.89 and 7,039.97

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Solution

The fourth proportional to 12,305.17, 18,435.89 and 7,039.97 is: 10,547.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,305.17 : 18,435.89 = 7,039.97 : x
  2. Step 2: Convert to fraction form
    12,305.17/18,435.89 = 7,039.97/x
  3. Step 3: Cross multiply
    12,305.17x = 18,435.89 × 7,039.97
  4. Step 4: Simplify right side
    12,305.17x = 129,788,067.48
  5. Step 5: Solve for x
    x = 129,788,067.48/12,305.17
  6. Step 6: Final answer
    x = 10,547.44

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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.