Home / 20,855.12-28,805.64-16,880.72

Finding the Fourth Proportional to 20,855.12, 28,805.64 and 16,880.72

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Solution

The fourth proportional to 20,855.12, 28,805.64 and 16,880.72 is: 23,316.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.12 : 28,805.64 = 16,880.72 : x
  2. Step 2: Convert to fraction form
    20,855.12/28,805.64 = 16,880.72/x
  3. Step 3: Cross multiply
    20,855.12x = 28,805.64 × 16,880.72
  4. Step 4: Simplify right side
    20,855.12x = 486,259,943.26
  5. Step 5: Solve for x
    x = 486,259,943.26/20,855.12
  6. Step 6: Final answer
    x = 23,316.09

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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.