Home / 22,405.73-30,930.41-12,972.47

Finding the Fourth Proportional to 22,405.73, 30,930.41 and 12,972.47

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Solution

The fourth proportional to 22,405.73, 30,930.41 and 12,972.47 is: 17,908.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,405.73 : 30,930.41 = 12,972.47 : x
  2. Step 2: Convert to fraction form
    22,405.73/30,930.41 = 12,972.47/x
  3. Step 3: Cross multiply
    22,405.73x = 30,930.41 × 12,972.47
  4. Step 4: Simplify right side
    22,405.73x = 401,243,750.95
  5. Step 5: Solve for x
    x = 401,243,750.95/22,405.73
  6. Step 6: Final answer
    x = 17,908.09

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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.