Home / 13,870.04-20,813.56-8,324.78

Finding the Fourth Proportional to 13,870.04, 20,813.56 and 8,324.78

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Solution

The fourth proportional to 13,870.04, 20,813.56 and 8,324.78 is: 12,492.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.04 : 20,813.56 = 8,324.78 : x
  2. Step 2: Convert to fraction form
    13,870.04/20,813.56 = 8,324.78/x
  3. Step 3: Cross multiply
    13,870.04x = 20,813.56 × 8,324.78
  4. Step 4: Simplify right side
    13,870.04x = 173,268,183.14
  5. Step 5: Solve for x
    x = 173,268,183.14/13,870.04
  6. Step 6: Final answer
    x = 12,492.27

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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.