Home / 13,609.06-18,779.12-7,640.68

Finding the Fourth Proportional to 13,609.06, 18,779.12 and 7,640.68

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Solution

The fourth proportional to 13,609.06, 18,779.12 and 7,640.68 is: 10,543.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,609.06 : 18,779.12 = 7,640.68 : x
  2. Step 2: Convert to fraction form
    13,609.06/18,779.12 = 7,640.68/x
  3. Step 3: Cross multiply
    13,609.06x = 18,779.12 × 7,640.68
  4. Step 4: Simplify right side
    13,609.06x = 143,485,203.82
  5. Step 5: Solve for x
    x = 143,485,203.82/13,609.06
  6. Step 6: Final answer
    x = 10,543.36

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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.