Home / 20,682.77-28,540.71-12,725.12

Finding the Fourth Proportional to 20,682.77, 28,540.71 and 12,725.12

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Solution

The fourth proportional to 20,682.77, 28,540.71 and 12,725.12 is: 17,559.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.77 : 28,540.71 = 12,725.12 : x
  2. Step 2: Convert to fraction form
    20,682.77/28,540.71 = 12,725.12/x
  3. Step 3: Cross multiply
    20,682.77x = 28,540.71 × 12,725.12
  4. Step 4: Simplify right side
    20,682.77x = 363,184,030.99
  5. Step 5: Solve for x
    x = 363,184,030.99/20,682.77
  6. Step 6: Final answer
    x = 17,559.74

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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.