Home / 12,987.44-19,485.80-4,222.39

Finding the Fourth Proportional to 12,987.44, 19,485.80 and 4,222.39

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Solution

The fourth proportional to 12,987.44, 19,485.80 and 4,222.39 is: 6,335.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,987.44 : 19,485.80 = 4,222.39 : x
  2. Step 2: Convert to fraction form
    12,987.44/19,485.80 = 4,222.39/x
  3. Step 3: Cross multiply
    12,987.44x = 19,485.80 × 4,222.39
  4. Step 4: Simplify right side
    12,987.44x = 82,276,647.06
  5. Step 5: Solve for x
    x = 82,276,647.06/12,987.44
  6. Step 6: Final answer
    x = 6,335.09

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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.