Home / 20,634.80-28,478.39-19,368.09

Finding the Fourth Proportional to 20,634.80, 28,478.39 and 19,368.09

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Solution

The fourth proportional to 20,634.80, 28,478.39 and 19,368.09 is: 26,730.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,634.80 : 28,478.39 = 19,368.09 : x
  2. Step 2: Convert to fraction form
    20,634.80/28,478.39 = 19,368.09/x
  3. Step 3: Cross multiply
    20,634.80x = 28,478.39 × 19,368.09
  4. Step 4: Simplify right side
    20,634.80x = 551,571,923.73
  5. Step 5: Solve for x
    x = 551,571,923.73/20,634.80
  6. Step 6: Final answer
    x = 26,730.19

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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.