Home / 13,421.69-18,523.63-8,116.54

Finding the Fourth Proportional to 13,421.69, 18,523.63 and 8,116.54

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Solution

The fourth proportional to 13,421.69, 18,523.63 and 8,116.54 is: 11,201.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.69 : 18,523.63 = 8,116.54 : x
  2. Step 2: Convert to fraction form
    13,421.69/18,523.63 = 8,116.54/x
  3. Step 3: Cross multiply
    13,421.69x = 18,523.63 × 8,116.54
  4. Step 4: Simplify right side
    13,421.69x = 150,347,691.22
  5. Step 5: Solve for x
    x = 150,347,691.22/13,421.69
  6. Step 6: Final answer
    x = 11,201.85

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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.