Home / 13,420.21-18,520.47-7,452.43

Finding the Fourth Proportional to 13,420.21, 18,520.47 and 7,452.43

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Solution

The fourth proportional to 13,420.21, 18,520.47 and 7,452.43 is: 10,284.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.21 : 18,520.47 = 7,452.43 : x
  2. Step 2: Convert to fraction form
    13,420.21/18,520.47 = 7,452.43/x
  3. Step 3: Cross multiply
    13,420.21x = 18,520.47 × 7,452.43
  4. Step 4: Simplify right side
    13,420.21x = 138,022,532.99
  5. Step 5: Solve for x
    x = 138,022,532.99/13,420.21
  6. Step 6: Final answer
    x = 10,284.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.