Home / 20,886.27-28,820.39-11,934.35

Finding the Fourth Proportional to 20,886.27, 28,820.39 and 11,934.35

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Solution

The fourth proportional to 20,886.27, 28,820.39 and 11,934.35 is: 16,467.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.27 : 28,820.39 = 11,934.35 : x
  2. Step 2: Convert to fraction form
    20,886.27/28,820.39 = 11,934.35/x
  3. Step 3: Cross multiply
    20,886.27x = 28,820.39 × 11,934.35
  4. Step 4: Simplify right side
    20,886.27x = 343,952,621.40
  5. Step 5: Solve for x
    x = 343,952,621.40/20,886.27
  6. Step 6: Final answer
    x = 16,467.88

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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.