Home / 13,748.12-18,972.29-7,779.73

Finding the Fourth Proportional to 13,748.12, 18,972.29 and 7,779.73

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Solution

The fourth proportional to 13,748.12, 18,972.29 and 7,779.73 is: 10,735.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,748.12 : 18,972.29 = 7,779.73 : x
  2. Step 2: Convert to fraction form
    13,748.12/18,972.29 = 7,779.73/x
  3. Step 3: Cross multiply
    13,748.12x = 18,972.29 × 7,779.73
  4. Step 4: Simplify right side
    13,748.12x = 147,599,293.68
  5. Step 5: Solve for x
    x = 147,599,293.68/13,748.12
  6. Step 6: Final answer
    x = 10,735.96

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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.