Home / 28,368.88-39,161.16-20,197.75

Finding the Fourth Proportional to 28,368.88, 39,161.16 and 20,197.75

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Solution

The fourth proportional to 28,368.88, 39,161.16 and 20,197.75 is: 27,881.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,368.88 : 39,161.16 = 20,197.75 : x
  2. Step 2: Convert to fraction form
    28,368.88/39,161.16 = 20,197.75/x
  3. Step 3: Cross multiply
    28,368.88x = 39,161.16 × 20,197.75
  4. Step 4: Simplify right side
    28,368.88x = 790,967,319.39
  5. Step 5: Solve for x
    x = 790,967,319.39/28,368.88
  6. Step 6: Final answer
    x = 27,881.51

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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.