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Finding the Fourth Proportional to 30,696.74, 42,367.55 and 19,954.92

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Solution

The fourth proportional to 30,696.74, 42,367.55 and 19,954.92 is: 27,541.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,696.74 : 42,367.55 = 19,954.92 : x
  2. Step 2: Convert to fraction form
    30,696.74/42,367.55 = 19,954.92/x
  3. Step 3: Cross multiply
    30,696.74x = 42,367.55 × 19,954.92
  4. Step 4: Simplify right side
    30,696.74x = 845,440,971.07
  5. Step 5: Solve for x
    x = 845,440,971.07/30,696.74
  6. Step 6: Final answer
    x = 27,541.72

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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.