Home / 30,999.39-42,779.79-16,853.15

Finding the Fourth Proportional to 30,999.39, 42,779.79 and 16,853.15

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Solution

The fourth proportional to 30,999.39, 42,779.79 and 16,853.15 is: 23,257.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,999.39 : 42,779.79 = 16,853.15 : x
  2. Step 2: Convert to fraction form
    30,999.39/42,779.79 = 16,853.15/x
  3. Step 3: Cross multiply
    30,999.39x = 42,779.79 × 16,853.15
  4. Step 4: Simplify right side
    30,999.39x = 720,974,003.94
  5. Step 5: Solve for x
    x = 720,974,003.94/30,999.39
  6. Step 6: Final answer
    x = 23,257.68

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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.