Home / 13,418.98-18,518.36-7,451.20

Finding the Fourth Proportional to 13,418.98, 18,518.36 and 7,451.20

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Solution

The fourth proportional to 13,418.98, 18,518.36 and 7,451.20 is: 10,282.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.98 : 18,518.36 = 7,451.20 : x
  2. Step 2: Convert to fraction form
    13,418.98/18,518.36 = 7,451.20/x
  3. Step 3: Cross multiply
    13,418.98x = 18,518.36 × 7,451.20
  4. Step 4: Simplify right side
    13,418.98x = 137,984,004.03
  5. Step 5: Solve for x
    x = 137,984,004.03/13,418.98
  6. Step 6: Final answer
    x = 10,282.75

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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.