Home / 13,613.38-18,789.70-8,312.67

Finding the Fourth Proportional to 13,613.38, 18,789.70 and 8,312.67

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Solution

The fourth proportional to 13,613.38, 18,789.70 and 8,312.67 is: 11,473.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.38 : 18,789.70 = 8,312.67 : x
  2. Step 2: Convert to fraction form
    13,613.38/18,789.70 = 8,312.67/x
  3. Step 3: Cross multiply
    13,613.38x = 18,789.70 × 8,312.67
  4. Step 4: Simplify right side
    13,613.38x = 156,192,575.50
  5. Step 5: Solve for x
    x = 156,192,575.50/13,613.38
  6. Step 6: Final answer
    x = 11,473.46

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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.