Home / 13,661.16-20,514.52-12,638.28

Finding the Fourth Proportional to 13,661.16, 20,514.52 and 12,638.28

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Solution

The fourth proportional to 13,661.16, 20,514.52 and 12,638.28 is: 18,978.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.16 : 20,514.52 = 12,638.28 : x
  2. Step 2: Convert to fraction form
    13,661.16/20,514.52 = 12,638.28/x
  3. Step 3: Cross multiply
    13,661.16x = 20,514.52 × 12,638.28
  4. Step 4: Simplify right side
    13,661.16x = 259,268,154.07
  5. Step 5: Solve for x
    x = 259,268,154.07/13,661.16
  6. Step 6: Final answer
    x = 18,978.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.