Home / 12,678.98-18,985.67-11,268.41

Finding the Fourth Proportional to 12,678.98, 18,985.67 and 11,268.41

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Solution

The fourth proportional to 12,678.98, 18,985.67 and 11,268.41 is: 16,873.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.98 : 18,985.67 = 11,268.41 : x
  2. Step 2: Convert to fraction form
    12,678.98/18,985.67 = 11,268.41/x
  3. Step 3: Cross multiply
    12,678.98x = 18,985.67 × 11,268.41
  4. Step 4: Simplify right side
    12,678.98x = 213,938,257.34
  5. Step 5: Solve for x
    x = 213,938,257.34/12,678.98
  6. Step 6: Final answer
    x = 16,873.46

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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.