Home / 20,518.45-30,782.43-6,479.87

Finding the Fourth Proportional to 20,518.45, 30,782.43 and 6,479.87

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Solution

The fourth proportional to 20,518.45, 30,782.43 and 6,479.87 is: 9,721.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.45 : 30,782.43 = 6,479.87 : x
  2. Step 2: Convert to fraction form
    20,518.45/30,782.43 = 6,479.87/x
  3. Step 3: Cross multiply
    20,518.45x = 30,782.43 × 6,479.87
  4. Step 4: Simplify right side
    20,518.45x = 199,465,990.77
  5. Step 5: Solve for x
    x = 199,465,990.77/20,518.45
  6. Step 6: Final answer
    x = 9,721.30

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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.