Home / 15,543.57-21,450.09-8,469.99

Finding the Fourth Proportional to 15,543.57, 21,450.09 and 8,469.99

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Solution

The fourth proportional to 15,543.57, 21,450.09 and 8,469.99 is: 11,688.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,543.57 : 21,450.09 = 8,469.99 : x
  2. Step 2: Convert to fraction form
    15,543.57/21,450.09 = 8,469.99/x
  3. Step 3: Cross multiply
    15,543.57x = 21,450.09 × 8,469.99
  4. Step 4: Simplify right side
    15,543.57x = 181,682,047.80
  5. Step 5: Solve for x
    x = 181,682,047.80/15,543.57
  6. Step 6: Final answer
    x = 11,688.57

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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.