Home / 30,999.09-42,779.21-16,851.95

Finding the Fourth Proportional to 30,999.09, 42,779.21 and 16,851.95

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Solution

The fourth proportional to 30,999.09, 42,779.21 and 16,851.95 is: 23,255.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,999.09 : 42,779.21 = 16,851.95 : x
  2. Step 2: Convert to fraction form
    30,999.09/42,779.21 = 16,851.95/x
  3. Step 3: Cross multiply
    30,999.09x = 42,779.21 × 16,851.95
  4. Step 4: Simplify right side
    30,999.09x = 720,912,809.80
  5. Step 5: Solve for x
    x = 720,912,809.80/30,999.09
  6. Step 6: Final answer
    x = 23,255.93

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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.