Home / 20,367.66-28,121.04-12,722.56

Finding the Fourth Proportional to 20,367.66, 28,121.04 and 12,722.56

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Solution

The fourth proportional to 20,367.66, 28,121.04 and 12,722.56 is: 17,565.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,367.66 : 28,121.04 = 12,722.56 : x
  2. Step 2: Convert to fraction form
    20,367.66/28,121.04 = 12,722.56/x
  3. Step 3: Cross multiply
    20,367.66x = 28,121.04 × 12,722.56
  4. Step 4: Simplify right side
    20,367.66x = 357,771,618.66
  5. Step 5: Solve for x
    x = 357,771,618.66/20,367.66
  6. Step 6: Final answer
    x = 17,565.67

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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.