Home / 30,806.81-42,517.78-17,379.30

Finding the Fourth Proportional to 30,806.81, 42,517.78 and 17,379.30

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Solution

The fourth proportional to 30,806.81, 42,517.78 and 17,379.30 is: 23,985.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,806.81 : 42,517.78 = 17,379.30 : x
  2. Step 2: Convert to fraction form
    30,806.81/42,517.78 = 17,379.30/x
  3. Step 3: Cross multiply
    30,806.81x = 42,517.78 × 17,379.30
  4. Step 4: Simplify right side
    30,806.81x = 738,929,369.95
  5. Step 5: Solve for x
    x = 738,929,369.95/30,806.81
  6. Step 6: Final answer
    x = 23,985.91

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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.