Home / 13,608.29-18,777.06-7,640.21

Finding the Fourth Proportional to 13,608.29, 18,777.06 and 7,640.21

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Solution

The fourth proportional to 13,608.29, 18,777.06 and 7,640.21 is: 10,542.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.29 : 18,777.06 = 7,640.21 : x
  2. Step 2: Convert to fraction form
    13,608.29/18,777.06 = 7,640.21/x
  3. Step 3: Cross multiply
    13,608.29x = 18,777.06 × 7,640.21
  4. Step 4: Simplify right side
    13,608.29x = 143,460,681.58
  5. Step 5: Solve for x
    x = 143,460,681.58/13,608.29
  6. Step 6: Final answer
    x = 10,542.15

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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.