Home / 20,483.87-30,686.43-12,563.28

Finding the Fourth Proportional to 20,483.87, 30,686.43 and 12,563.28

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Solution

The fourth proportional to 20,483.87, 30,686.43 and 12,563.28 is: 18,820.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,483.87 : 30,686.43 = 12,563.28 : x
  2. Step 2: Convert to fraction form
    20,483.87/30,686.43 = 12,563.28/x
  3. Step 3: Cross multiply
    20,483.87x = 30,686.43 × 12,563.28
  4. Step 4: Simplify right side
    20,483.87x = 385,522,212.29
  5. Step 5: Solve for x
    x = 385,522,212.29/20,483.87
  6. Step 6: Final answer
    x = 18,820.77

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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.