Home / 12,712.47-17,542.57-7,122.39

Finding the Fourth Proportional to 12,712.47, 17,542.57 and 7,122.39

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Solution

The fourth proportional to 12,712.47, 17,542.57 and 7,122.39 is: 9,828.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,712.47 : 17,542.57 = 7,122.39 : x
  2. Step 2: Convert to fraction form
    12,712.47/17,542.57 = 7,122.39/x
  3. Step 3: Cross multiply
    12,712.47x = 17,542.57 × 7,122.39
  4. Step 4: Simplify right side
    12,712.47x = 124,945,025.14
  5. Step 5: Solve for x
    x = 124,945,025.14/12,712.47
  6. Step 6: Final answer
    x = 9,828.54

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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.