Home / 21,992.57-30,353.81-12,561.13

Finding the Fourth Proportional to 21,992.57, 30,353.81 and 12,561.13

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Solution

The fourth proportional to 21,992.57, 30,353.81 and 12,561.13 is: 17,336.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,992.57 : 30,353.81 = 12,561.13 : x
  2. Step 2: Convert to fraction form
    21,992.57/30,353.81 = 12,561.13/x
  3. Step 3: Cross multiply
    21,992.57x = 30,353.81 × 12,561.13
  4. Step 4: Simplify right side
    21,992.57x = 381,278,153.41
  5. Step 5: Solve for x
    x = 381,278,153.41/21,992.57
  6. Step 6: Final answer
    x = 17,336.68

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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.