Home / 20,586.92-28,399.48-13,020.50

Finding the Fourth Proportional to 20,586.92, 28,399.48 and 13,020.50

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Solution

The fourth proportional to 20,586.92, 28,399.48 and 13,020.50 is: 17,961.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.92 : 28,399.48 = 13,020.50 : x
  2. Step 2: Convert to fraction form
    20,586.92/28,399.48 = 13,020.50/x
  3. Step 3: Cross multiply
    20,586.92x = 28,399.48 × 13,020.50
  4. Step 4: Simplify right side
    20,586.92x = 369,775,467.79
  5. Step 5: Solve for x
    x = 369,775,467.79/20,586.92
  6. Step 6: Final answer
    x = 17,961.67

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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.