Home / 20,386.46-28,133.55-11,311.99

Finding the Fourth Proportional to 20,386.46, 28,133.55 and 11,311.99

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Solution

The fourth proportional to 20,386.46, 28,133.55 and 11,311.99 is: 15,610.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.46 : 28,133.55 = 11,311.99 : x
  2. Step 2: Convert to fraction form
    20,386.46/28,133.55 = 11,311.99/x
  3. Step 3: Cross multiply
    20,386.46x = 28,133.55 × 11,311.99
  4. Step 4: Simplify right side
    20,386.46x = 318,246,365.93
  5. Step 5: Solve for x
    x = 318,246,365.93/20,386.46
  6. Step 6: Final answer
    x = 15,610.67

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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.