Home / 13,508.75-18,640.22-7,539.65

Finding the Fourth Proportional to 13,508.75, 18,640.22 and 7,539.65

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Solution

The fourth proportional to 13,508.75, 18,640.22 and 7,539.65 is: 10,403.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,508.75 : 18,640.22 = 7,539.65 : x
  2. Step 2: Convert to fraction form
    13,508.75/18,640.22 = 7,539.65/x
  3. Step 3: Cross multiply
    13,508.75x = 18,640.22 × 7,539.65
  4. Step 4: Simplify right side
    13,508.75x = 140,540,603.82
  5. Step 5: Solve for x
    x = 140,540,603.82/13,508.75
  6. Step 6: Final answer
    x = 10,403.68

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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.