Home / 20,518.17-30,782.04-6,479.61

Finding the Fourth Proportional to 20,518.17, 30,782.04 and 6,479.61

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Solution

The fourth proportional to 20,518.17, 30,782.04 and 6,479.61 is: 9,720.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.17 : 30,782.04 = 6,479.61 : x
  2. Step 2: Convert to fraction form
    20,518.17/30,782.04 = 6,479.61/x
  3. Step 3: Cross multiply
    20,518.17x = 30,782.04 × 6,479.61
  4. Step 4: Simplify right side
    20,518.17x = 199,455,614.20
  5. Step 5: Solve for x
    x = 199,455,614.20/20,518.17
  6. Step 6: Final answer
    x = 9,720.93

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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.