Home / 13,688.55-18,890.22-8,022.18

Finding the Fourth Proportional to 13,688.55, 18,890.22 and 8,022.18

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Solution

The fourth proportional to 13,688.55, 18,890.22 and 8,022.18 is: 11,070.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.55 : 18,890.22 = 8,022.18 : x
  2. Step 2: Convert to fraction form
    13,688.55/18,890.22 = 8,022.18/x
  3. Step 3: Cross multiply
    13,688.55x = 18,890.22 × 8,022.18
  4. Step 4: Simplify right side
    13,688.55x = 151,540,745.08
  5. Step 5: Solve for x
    x = 151,540,745.08/13,688.55
  6. Step 6: Final answer
    x = 11,070.62

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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.