Home / 13,286.84-18,203.06-12,788.60

Finding the Fourth Proportional to 13,286.84, 18,203.06 and 12,788.60

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Solution

The fourth proportional to 13,286.84, 18,203.06 and 12,788.60 is: 17,520.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.84 : 18,203.06 = 12,788.60 : x
  2. Step 2: Convert to fraction form
    13,286.84/18,203.06 = 12,788.60/x
  3. Step 3: Cross multiply
    13,286.84x = 18,203.06 × 12,788.60
  4. Step 4: Simplify right side
    13,286.84x = 232,791,653.12
  5. Step 5: Solve for x
    x = 232,791,653.12/13,286.84
  6. Step 6: Final answer
    x = 17,520.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.