Home / 13,408.08-18,503.07-7,742.75

Finding the Fourth Proportional to 13,408.08, 18,503.07 and 7,742.75

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Solution

The fourth proportional to 13,408.08, 18,503.07 and 7,742.75 is: 10,684.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.08 : 18,503.07 = 7,742.75 : x
  2. Step 2: Convert to fraction form
    13,408.08/18,503.07 = 7,742.75/x
  3. Step 3: Cross multiply
    13,408.08x = 18,503.07 × 7,742.75
  4. Step 4: Simplify right side
    13,408.08x = 143,264,552.73
  5. Step 5: Solve for x
    x = 143,264,552.73/13,408.08
  6. Step 6: Final answer
    x = 10,684.94

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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.