Home / 13,829.10-20,718.90-8,409.60

Finding the Fourth Proportional to 13,829.10, 20,718.90 and 8,409.60

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Solution

The fourth proportional to 13,829.10, 20,718.90 and 8,409.60 is: 12,599.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,829.10 : 20,718.90 = 8,409.60 : x
  2. Step 2: Convert to fraction form
    13,829.10/20,718.90 = 8,409.60/x
  3. Step 3: Cross multiply
    13,829.10x = 20,718.90 × 8,409.60
  4. Step 4: Simplify right side
    13,829.10x = 174,237,661.44
  5. Step 5: Solve for x
    x = 174,237,661.44/13,829.10
  6. Step 6: Final answer
    x = 12,599.35

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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.