Home / 21,863.81-30,170.88-12,431.75

Finding the Fourth Proportional to 21,863.81, 30,170.88 and 12,431.75

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Solution

The fourth proportional to 21,863.81, 30,170.88 and 12,431.75 is: 17,155.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,863.81 : 30,170.88 = 12,431.75 : x
  2. Step 2: Convert to fraction form
    21,863.81/30,170.88 = 12,431.75/x
  3. Step 3: Cross multiply
    21,863.81x = 30,170.88 × 12,431.75
  4. Step 4: Simplify right side
    21,863.81x = 375,076,837.44
  5. Step 5: Solve for x
    x = 375,076,837.44/21,863.81
  6. Step 6: Final answer
    x = 17,155.15

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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.