Home / 12,720.19-19,083.75-6,146.38

Finding the Fourth Proportional to 12,720.19, 19,083.75 and 6,146.38

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Solution

The fourth proportional to 12,720.19, 19,083.75 and 6,146.38 is: 9,221.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.19 : 19,083.75 = 6,146.38 : x
  2. Step 2: Convert to fraction form
    12,720.19/19,083.75 = 6,146.38/x
  3. Step 3: Cross multiply
    12,720.19x = 19,083.75 × 6,146.38
  4. Step 4: Simplify right side
    12,720.19x = 117,296,014.70
  5. Step 5: Solve for x
    x = 117,296,014.70/12,720.19
  6. Step 6: Final answer
    x = 9,221.25

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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.