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Finding the Fourth Proportional to 11,316.33, 16,978.55 and 5,771.07

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Solution

The fourth proportional to 11,316.33, 16,978.55 and 5,771.07 is: 8,658.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,316.33 : 16,978.55 = 5,771.07 : x
  2. Step 2: Convert to fraction form
    11,316.33/16,978.55 = 5,771.07/x
  3. Step 3: Cross multiply
    11,316.33x = 16,978.55 × 5,771.07
  4. Step 4: Simplify right side
    11,316.33x = 97,984,371.69
  5. Step 5: Solve for x
    x = 97,984,371.69/11,316.33
  6. Step 6: Final answer
    x = 8,658.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.