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Finding the Fourth Proportional to 18,878.64, 25,993.08 and 16,040.40

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Solution

The fourth proportional to 18,878.64, 25,993.08 and 16,040.40 is: 22,085.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.64 : 25,993.08 = 16,040.40 : x
  2. Step 2: Convert to fraction form
    18,878.64/25,993.08 = 16,040.40/x
  3. Step 3: Cross multiply
    18,878.64x = 25,993.08 × 16,040.40
  4. Step 4: Simplify right side
    18,878.64x = 416,939,400.43
  5. Step 5: Solve for x
    x = 416,939,400.43/18,878.64
  6. Step 6: Final answer
    x = 22,085.25

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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.