Home / 20,886.40-28,820.56-11,934.48

Finding the Fourth Proportional to 20,886.40, 28,820.56 and 11,934.48

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Solution

The fourth proportional to 20,886.40, 28,820.56 and 11,934.48 is: 16,468.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.40 : 28,820.56 = 11,934.48 : x
  2. Step 2: Convert to fraction form
    20,886.40/28,820.56 = 11,934.48/x
  3. Step 3: Cross multiply
    20,886.40x = 28,820.56 × 11,934.48
  4. Step 4: Simplify right side
    20,886.40x = 343,958,396.91
  5. Step 5: Solve for x
    x = 343,958,396.91/20,886.40
  6. Step 6: Final answer
    x = 16,468.06

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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.