Home / 20,362.29-28,086.26-11,978.79

Finding the Fourth Proportional to 20,362.29, 28,086.26 and 11,978.79

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Solution

The fourth proportional to 20,362.29, 28,086.26 and 11,978.79 is: 16,522.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,362.29 : 28,086.26 = 11,978.79 : x
  2. Step 2: Convert to fraction form
    20,362.29/28,086.26 = 11,978.79/x
  3. Step 3: Cross multiply
    20,362.29x = 28,086.26 × 11,978.79
  4. Step 4: Simplify right side
    20,362.29x = 336,439,350.53
  5. Step 5: Solve for x
    x = 336,439,350.53/20,362.29
  6. Step 6: Final answer
    x = 16,522.67

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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.