Home / 20,921.27-28,828.42-19,444.64

Finding the Fourth Proportional to 20,921.27, 28,828.42 and 19,444.64

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Solution

The fourth proportional to 20,921.27, 28,828.42 and 19,444.64 is: 26,793.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.27 : 28,828.42 = 19,444.64 : x
  2. Step 2: Convert to fraction form
    20,921.27/28,828.42 = 19,444.64/x
  3. Step 3: Cross multiply
    20,921.27x = 28,828.42 × 19,444.64
  4. Step 4: Simplify right side
    20,921.27x = 560,558,055.92
  5. Step 5: Solve for x
    x = 560,558,055.92/20,921.27
  6. Step 6: Final answer
    x = 26,793.70

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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.