Home / 28,755.84-39,698.64-20,168.40

Finding the Fourth Proportional to 28,755.84, 39,698.64 and 20,168.40

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Solution

The fourth proportional to 28,755.84, 39,698.64 and 20,168.40 is: 27,843.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,755.84 : 39,698.64 = 20,168.40 : x
  2. Step 2: Convert to fraction form
    28,755.84/39,698.64 = 20,168.40/x
  3. Step 3: Cross multiply
    28,755.84x = 39,698.64 × 20,168.40
  4. Step 4: Simplify right side
    28,755.84x = 800,658,050.98
  5. Step 5: Solve for x
    x = 800,658,050.98/28,755.84
  6. Step 6: Final answer
    x = 27,843.32

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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.