Home / 21,984.75-30,344.49-12,558.78

Finding the Fourth Proportional to 21,984.75, 30,344.49 and 12,558.78

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Solution

The fourth proportional to 21,984.75, 30,344.49 and 12,558.78 is: 17,334.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,984.75 : 30,344.49 = 12,558.78 : x
  2. Step 2: Convert to fraction form
    21,984.75/30,344.49 = 12,558.78/x
  3. Step 3: Cross multiply
    21,984.75x = 30,344.49 × 12,558.78
  4. Step 4: Simplify right side
    21,984.75x = 381,089,774.12
  5. Step 5: Solve for x
    x = 381,089,774.12/21,984.75
  6. Step 6: Final answer
    x = 17,334.28

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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.