Home / 20,838.66-28,757.46-11,886.40

Finding the Fourth Proportional to 20,838.66, 28,757.46 and 11,886.40

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Solution

The fourth proportional to 20,838.66, 28,757.46 and 11,886.40 is: 16,403.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.66 : 28,757.46 = 11,886.40 : x
  2. Step 2: Convert to fraction form
    20,838.66/28,757.46 = 11,886.40/x
  3. Step 3: Cross multiply
    20,838.66x = 28,757.46 × 11,886.40
  4. Step 4: Simplify right side
    20,838.66x = 341,822,672.54
  5. Step 5: Solve for x
    x = 341,822,672.54/20,838.66
  6. Step 6: Final answer
    x = 16,403.29

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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.