Home / 13,515.82-20,277.38-12,214.55

Finding the Fourth Proportional to 13,515.82, 20,277.38 and 12,214.55

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Solution

The fourth proportional to 13,515.82, 20,277.38 and 12,214.55 is: 18,325.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.82 : 20,277.38 = 12,214.55 : x
  2. Step 2: Convert to fraction form
    13,515.82/20,277.38 = 12,214.55/x
  3. Step 3: Cross multiply
    13,515.82x = 20,277.38 × 12,214.55
  4. Step 4: Simplify right side
    13,515.82x = 247,679,153.11
  5. Step 5: Solve for x
    x = 247,679,153.11/13,515.82
  6. Step 6: Final answer
    x = 18,325.13

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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.