Home / 20,405.72-30,566.46-18,929.36

Finding the Fourth Proportional to 20,405.72, 30,566.46 and 18,929.36

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Solution

The fourth proportional to 20,405.72, 30,566.46 and 18,929.36 is: 28,354.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.72 : 30,566.46 = 18,929.36 : x
  2. Step 2: Convert to fraction form
    20,405.72/30,566.46 = 18,929.36/x
  3. Step 3: Cross multiply
    20,405.72x = 30,566.46 × 18,929.36
  4. Step 4: Simplify right side
    20,405.72x = 578,603,525.27
  5. Step 5: Solve for x
    x = 578,603,525.27/20,405.72
  6. Step 6: Final answer
    x = 28,354.97

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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.