Home / 13,634.55-18,815.36-8,918.73

Finding the Fourth Proportional to 13,634.55, 18,815.36 and 8,918.73

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Solution

The fourth proportional to 13,634.55, 18,815.36 and 8,918.73 is: 12,307.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,634.55 : 18,815.36 = 8,918.73 : x
  2. Step 2: Convert to fraction form
    13,634.55/18,815.36 = 8,918.73/x
  3. Step 3: Cross multiply
    13,634.55x = 18,815.36 × 8,918.73
  4. Step 4: Simplify right side
    13,634.55x = 167,809,071.10
  5. Step 5: Solve for x
    x = 167,809,071.10/13,634.55
  6. Step 6: Final answer
    x = 12,307.64

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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.