Home / 12,422.07-17,139.06-8,640.99

Finding the Fourth Proportional to 12,422.07, 17,139.06 and 8,640.99

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Solution

The fourth proportional to 12,422.07, 17,139.06 and 8,640.99 is: 11,922.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,422.07 : 17,139.06 = 8,640.99 : x
  2. Step 2: Convert to fraction form
    12,422.07/17,139.06 = 8,640.99/x
  3. Step 3: Cross multiply
    12,422.07x = 17,139.06 × 8,640.99
  4. Step 4: Simplify right side
    12,422.07x = 148,098,446.07
  5. Step 5: Solve for x
    x = 148,098,446.07/12,422.07
  6. Step 6: Final answer
    x = 11,922.20

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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.