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Finding the Fourth Proportional to 30,698.26, 42,358.93 and 17,272.81

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Solution

The fourth proportional to 30,698.26, 42,358.93 and 17,272.81 is: 23,833.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,698.26 : 42,358.93 = 17,272.81 : x
  2. Step 2: Convert to fraction form
    30,698.26/42,358.93 = 17,272.81/x
  3. Step 3: Cross multiply
    30,698.26x = 42,358.93 × 17,272.81
  4. Step 4: Simplify right side
    30,698.26x = 731,657,749.69
  5. Step 5: Solve for x
    x = 731,657,749.69/30,698.26
  6. Step 6: Final answer
    x = 23,833.85

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.