Home / 13,420.21-18,519.53-7,451.72

Finding the Fourth Proportional to 13,420.21, 18,519.53 and 7,451.72

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Solution

The fourth proportional to 13,420.21, 18,519.53 and 7,451.72 is: 10,283.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.21 : 18,519.53 = 7,451.72 : x
  2. Step 2: Convert to fraction form
    13,420.21/18,519.53 = 7,451.72/x
  3. Step 3: Cross multiply
    13,420.21x = 18,519.53 × 7,451.72
  4. Step 4: Simplify right side
    13,420.21x = 138,002,352.09
  5. Step 5: Solve for x
    x = 138,002,352.09/13,420.21
  6. Step 6: Final answer
    x = 10,283.17

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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.