Home / 12,422.86-17,146.02-7,121.26

Finding the Fourth Proportional to 12,422.86, 17,146.02 and 7,121.26

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Solution

The fourth proportional to 12,422.86, 17,146.02 and 7,121.26 is: 9,828.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,422.86 : 17,146.02 = 7,121.26 : x
  2. Step 2: Convert to fraction form
    12,422.86/17,146.02 = 7,121.26/x
  3. Step 3: Cross multiply
    12,422.86x = 17,146.02 × 7,121.26
  4. Step 4: Simplify right side
    12,422.86x = 122,101,266.39
  5. Step 5: Solve for x
    x = 122,101,266.39/12,422.86
  6. Step 6: Final answer
    x = 9,828.76

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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.