Home / 13,855.23-19,120.68-7,806.51

Finding the Fourth Proportional to 13,855.23, 19,120.68 and 7,806.51

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Solution

The fourth proportional to 13,855.23, 19,120.68 and 7,806.51 is: 10,773.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.23 : 19,120.68 = 7,806.51 : x
  2. Step 2: Convert to fraction form
    13,855.23/19,120.68 = 7,806.51/x
  3. Step 3: Cross multiply
    13,855.23x = 19,120.68 × 7,806.51
  4. Step 4: Simplify right side
    13,855.23x = 149,265,779.63
  5. Step 5: Solve for x
    x = 149,265,779.63/13,855.23
  6. Step 6: Final answer
    x = 10,773.24

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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.