Home / 13,747.50-18,972.48-7,779.14

Finding the Fourth Proportional to 13,747.50, 18,972.48 and 7,779.14

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Solution

The fourth proportional to 13,747.50, 18,972.48 and 7,779.14 is: 10,735.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.50 : 18,972.48 = 7,779.14 : x
  2. Step 2: Convert to fraction form
    13,747.50/18,972.48 = 7,779.14/x
  3. Step 3: Cross multiply
    13,747.50x = 18,972.48 × 7,779.14
  4. Step 4: Simplify right side
    13,747.50x = 147,589,578.07
  5. Step 5: Solve for x
    x = 147,589,578.07/13,747.50
  6. Step 6: Final answer
    x = 10,735.74

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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.