Home / 13,747.56-18,971.37-7,779.12

Finding the Fourth Proportional to 13,747.56, 18,971.37 and 7,779.12

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Solution

The fourth proportional to 13,747.56, 18,971.37 and 7,779.12 is: 10,735.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.56 : 18,971.37 = 7,779.12 : x
  2. Step 2: Convert to fraction form
    13,747.56/18,971.37 = 7,779.12/x
  3. Step 3: Cross multiply
    13,747.56x = 18,971.37 × 7,779.12
  4. Step 4: Simplify right side
    13,747.56x = 147,580,563.79
  5. Step 5: Solve for x
    x = 147,580,563.79/13,747.56
  6. Step 6: Final answer
    x = 10,735.04

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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.