Home / 21,984.21-30,343.68-12,558.24

Finding the Fourth Proportional to 21,984.21, 30,343.68 and 12,558.24

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Solution

The fourth proportional to 21,984.21, 30,343.68 and 12,558.24 is: 17,333.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,984.21 : 30,343.68 = 12,558.24 : x
  2. Step 2: Convert to fraction form
    21,984.21/30,343.68 = 12,558.24/x
  3. Step 3: Cross multiply
    21,984.21x = 30,343.68 × 12,558.24
  4. Step 4: Simplify right side
    21,984.21x = 381,063,215.92
  5. Step 5: Solve for x
    x = 381,063,215.92/21,984.21
  6. Step 6: Final answer
    x = 17,333.50

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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.