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Finding the Fourth Proportional to 30,933, 42,693.90 and 17,505

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Solution

The fourth proportional to 30,933, 42,693.90 and 17,505 is: 24,160.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,933 : 42,693.90 = 17,505 : x
  2. Step 2: Convert to fraction form
    30,933/42,693.90 = 17,505/x
  3. Step 3: Cross multiply
    30,933x = 42,693.90 × 17,505
  4. Step 4: Simplify right side
    30,933x = 747,356,719.50
  5. Step 5: Solve for x
    x = 747,356,719.50/30,933
  6. Step 6: Final answer
    x = 24,160.50

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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.