Home / 12,721.40-17,564.22-7,948.61

Finding the Fourth Proportional to 12,721.40, 17,564.22 and 7,948.61

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Solution

The fourth proportional to 12,721.40, 17,564.22 and 7,948.61 is: 10,974.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.40 : 17,564.22 = 7,948.61 : x
  2. Step 2: Convert to fraction form
    12,721.40/17,564.22 = 7,948.61/x
  3. Step 3: Cross multiply
    12,721.40x = 17,564.22 × 7,948.61
  4. Step 4: Simplify right side
    12,721.40x = 139,611,134.73
  5. Step 5: Solve for x
    x = 139,611,134.73/12,721.40
  6. Step 6: Final answer
    x = 10,974.51

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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.