Home / 13,608.29-18,780.53-7,640.35

Finding the Fourth Proportional to 13,608.29, 18,780.53 and 7,640.35

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Solution

The fourth proportional to 13,608.29, 18,780.53 and 7,640.35 is: 10,544.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.29 : 18,780.53 = 7,640.35 : x
  2. Step 2: Convert to fraction form
    13,608.29/18,780.53 = 7,640.35/x
  3. Step 3: Cross multiply
    13,608.29x = 18,780.53 × 7,640.35
  4. Step 4: Simplify right side
    13,608.29x = 143,489,784.18
  5. Step 5: Solve for x
    x = 143,489,784.18/13,608.29
  6. Step 6: Final answer
    x = 10,544.29

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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.