Home / 13,608.30-18,777.06-7,640.22

Finding the Fourth Proportional to 13,608.30, 18,777.06 and 7,640.22

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Solution

The fourth proportional to 13,608.30, 18,777.06 and 7,640.22 is: 10,542.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.30 : 18,777.06 = 7,640.22 : x
  2. Step 2: Convert to fraction form
    13,608.30/18,777.06 = 7,640.22/x
  3. Step 3: Cross multiply
    13,608.30x = 18,777.06 × 7,640.22
  4. Step 4: Simplify right side
    13,608.30x = 143,460,869.35
  5. Step 5: Solve for x
    x = 143,460,869.35/13,608.30
  6. Step 6: Final answer
    x = 10,542.16

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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.