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Finding the Fourth Proportional to 30,698.63, 42,340.12 and 19,946.97

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Solution

The fourth proportional to 30,698.63, 42,340.12 and 19,946.97 is: 27,511.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,698.63 : 42,340.12 = 19,946.97 : x
  2. Step 2: Convert to fraction form
    30,698.63/42,340.12 = 19,946.97/x
  3. Step 3: Cross multiply
    30,698.63x = 42,340.12 × 19,946.97
  4. Step 4: Simplify right side
    30,698.63x = 844,557,053.57
  5. Step 5: Solve for x
    x = 844,557,053.57/30,698.63
  6. Step 6: Final answer
    x = 27,511.23

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Double scale
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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.