Home / 13,145.68-18,135.66-8,671.60

Finding the Fourth Proportional to 13,145.68, 18,135.66 and 8,671.60

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Solution

The fourth proportional to 13,145.68, 18,135.66 and 8,671.60 is: 11,963.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.68 : 18,135.66 = 8,671.60 : x
  2. Step 2: Convert to fraction form
    13,145.68/18,135.66 = 8,671.60/x
  3. Step 3: Cross multiply
    13,145.68x = 18,135.66 × 8,671.60
  4. Step 4: Simplify right side
    13,145.68x = 157,265,189.26
  5. Step 5: Solve for x
    x = 157,265,189.26/13,145.68
  6. Step 6: Final answer
    x = 11,963.26

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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.