Home / 31,008.75-42,791.86-16,861.60

Finding the Fourth Proportional to 31,008.75, 42,791.86 and 16,861.60

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Solution

The fourth proportional to 31,008.75, 42,791.86 and 16,861.60 is: 23,268.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,008.75 : 42,791.86 = 16,861.60 : x
  2. Step 2: Convert to fraction form
    31,008.75/42,791.86 = 16,861.60/x
  3. Step 3: Cross multiply
    31,008.75x = 42,791.86 × 16,861.60
  4. Step 4: Simplify right side
    31,008.75x = 721,539,226.58
  5. Step 5: Solve for x
    x = 721,539,226.58/31,008.75
  6. Step 6: Final answer
    x = 23,268.89

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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.