Home / 13,416.80-20,128.40-5,621.28

Finding the Fourth Proportional to 13,416.80, 20,128.40 and 5,621.28

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Solution

The fourth proportional to 13,416.80, 20,128.40 and 5,621.28 is: 8,433.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,416.80 : 20,128.40 = 5,621.28 : x
  2. Step 2: Convert to fraction form
    13,416.80/20,128.40 = 5,621.28/x
  3. Step 3: Cross multiply
    13,416.80x = 20,128.40 × 5,621.28
  4. Step 4: Simplify right side
    13,416.80x = 113,147,372.35
  5. Step 5: Solve for x
    x = 113,147,372.35/13,416.80
  6. Step 6: Final answer
    x = 8,433.26

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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.