Home / 13,164.75-18,153.55-8,682.78

Finding the Fourth Proportional to 13,164.75, 18,153.55 and 8,682.78

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Solution

The fourth proportional to 13,164.75, 18,153.55 and 8,682.78 is: 11,973.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,164.75 : 18,153.55 = 8,682.78 : x
  2. Step 2: Convert to fraction form
    13,164.75/18,153.55 = 8,682.78/x
  3. Step 3: Cross multiply
    13,164.75x = 18,153.55 × 8,682.78
  4. Step 4: Simplify right side
    13,164.75x = 157,623,280.87
  5. Step 5: Solve for x
    x = 157,623,280.87/13,164.75
  6. Step 6: Final answer
    x = 11,973.13

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Double scale
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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.