Home / 30,809.29-42,517.29-17,380.81

Finding the Fourth Proportional to 30,809.29, 42,517.29 and 17,380.81

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Solution

The fourth proportional to 30,809.29, 42,517.29 and 17,380.81 is: 23,985.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,809.29 : 42,517.29 = 17,380.81 : x
  2. Step 2: Convert to fraction form
    30,809.29/42,517.29 = 17,380.81/x
  3. Step 3: Cross multiply
    30,809.29x = 42,517.29 × 17,380.81
  4. Step 4: Simplify right side
    30,809.29x = 738,984,939.20
  5. Step 5: Solve for x
    x = 738,984,939.20/30,809.29
  6. Step 6: Final answer
    x = 23,985.78

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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.