Home / 13,625.12-20,420.40-13,478.24

Finding the Fourth Proportional to 13,625.12, 20,420.40 and 13,478.24

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Solution

The fourth proportional to 13,625.12, 20,420.40 and 13,478.24 is: 20,200.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,625.12 : 20,420.40 = 13,478.24 : x
  2. Step 2: Convert to fraction form
    13,625.12/20,420.40 = 13,478.24/x
  3. Step 3: Cross multiply
    13,625.12x = 20,420.40 × 13,478.24
  4. Step 4: Simplify right side
    13,625.12x = 275,231,052.10
  5. Step 5: Solve for x
    x = 275,231,052.10/13,625.12
  6. Step 6: Final answer
    x = 20,200.27

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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.