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Finding the Fourth Proportional to 19,919.69, 29,879.54 and 6,589.11

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Solution

The fourth proportional to 19,919.69, 29,879.54 and 6,589.11 is: 9,883.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,919.69 : 29,879.54 = 6,589.11 : x
  2. Step 2: Convert to fraction form
    19,919.69/29,879.54 = 6,589.11/x
  3. Step 3: Cross multiply
    19,919.69x = 29,879.54 × 6,589.11
  4. Step 4: Simplify right side
    19,919.69x = 196,879,575.81
  5. Step 5: Solve for x
    x = 196,879,575.81/19,919.69
  6. Step 6: Final answer
    x = 9,883.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.