Home / 13,747.82-18,972.51-7,779.74

Finding the Fourth Proportional to 13,747.82, 18,972.51 and 7,779.74

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Solution

The fourth proportional to 13,747.82, 18,972.51 and 7,779.74 is: 10,736.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.82 : 18,972.51 = 7,779.74 : x
  2. Step 2: Convert to fraction form
    13,747.82/18,972.51 = 7,779.74/x
  3. Step 3: Cross multiply
    13,747.82x = 18,972.51 × 7,779.74
  4. Step 4: Simplify right side
    13,747.82x = 147,601,194.95
  5. Step 5: Solve for x
    x = 147,601,194.95/13,747.82
  6. Step 6: Final answer
    x = 10,736.33

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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.