Home / 13,168.55-18,182.12-8,139.67

Finding the Fourth Proportional to 13,168.55, 18,182.12 and 8,139.67

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Solution

The fourth proportional to 13,168.55, 18,182.12 and 8,139.67 is: 11,238.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,168.55 : 18,182.12 = 8,139.67 : x
  2. Step 2: Convert to fraction form
    13,168.55/18,182.12 = 8,139.67/x
  3. Step 3: Cross multiply
    13,168.55x = 18,182.12 × 8,139.67
  4. Step 4: Simplify right side
    13,168.55x = 147,996,370.55
  5. Step 5: Solve for x
    x = 147,996,370.55/13,168.55
  6. Step 6: Final answer
    x = 11,238.62

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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.