Home / 13,148.33-18,164.49-8,621.78

Finding the Fourth Proportional to 13,148.33, 18,164.49 and 8,621.78

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Solution

The fourth proportional to 13,148.33, 18,164.49 and 8,621.78 is: 11,911.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,148.33 : 18,164.49 = 8,621.78 : x
  2. Step 2: Convert to fraction form
    13,148.33/18,164.49 = 8,621.78/x
  3. Step 3: Cross multiply
    13,148.33x = 18,164.49 × 8,621.78
  4. Step 4: Simplify right side
    13,148.33x = 156,610,236.59
  5. Step 5: Solve for x
    x = 156,610,236.59/13,148.33
  6. Step 6: Final answer
    x = 11,911.04

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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.