Home / 21,999.79-30,356.94-12,568.96

Finding the Fourth Proportional to 21,999.79, 30,356.94 and 12,568.96

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Solution

The fourth proportional to 21,999.79, 30,356.94 and 12,568.96 is: 17,343.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999.79 : 30,356.94 = 12,568.96 : x
  2. Step 2: Convert to fraction form
    21,999.79/30,356.94 = 12,568.96/x
  3. Step 3: Cross multiply
    21,999.79x = 30,356.94 × 12,568.96
  4. Step 4: Simplify right side
    21,999.79x = 381,555,164.58
  5. Step 5: Solve for x
    x = 381,555,164.58/21,999.79
  6. Step 6: Final answer
    x = 17,343.58

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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.