Home / 15,450.39-21,321.41-8,376.80

Finding the Fourth Proportional to 15,450.39, 21,321.41 and 8,376.80

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Solution

The fourth proportional to 15,450.39, 21,321.41 and 8,376.80 is: 11,559.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,450.39 : 21,321.41 = 8,376.80 : x
  2. Step 2: Convert to fraction form
    15,450.39/21,321.41 = 8,376.80/x
  3. Step 3: Cross multiply
    15,450.39x = 21,321.41 × 8,376.80
  4. Step 4: Simplify right side
    15,450.39x = 178,605,038.80
  5. Step 5: Solve for x
    x = 178,605,038.80/15,450.39
  6. Step 6: Final answer
    x = 11,559.90

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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.