Home / 12,731.36-17,570.94-7,142.36

Finding the Fourth Proportional to 12,731.36, 17,570.94 and 7,142.36

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Solution

The fourth proportional to 12,731.36, 17,570.94 and 7,142.36 is: 9,857.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,731.36 : 17,570.94 = 7,142.36 : x
  2. Step 2: Convert to fraction form
    12,731.36/17,570.94 = 7,142.36/x
  3. Step 3: Cross multiply
    12,731.36x = 17,570.94 × 7,142.36
  4. Step 4: Simplify right side
    12,731.36x = 125,497,979.02
  5. Step 5: Solve for x
    x = 125,497,979.02/12,731.36
  6. Step 6: Final answer
    x = 9,857.39

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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.