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Finding the Fourth Proportional to 28,610.40, 39,485.04 and 16,672.80

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Solution

The fourth proportional to 28,610.40, 39,485.04 and 16,672.80 is: 23,010.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,610.40 : 39,485.04 = 16,672.80 : x
  2. Step 2: Convert to fraction form
    28,610.40/39,485.04 = 16,672.80/x
  3. Step 3: Cross multiply
    28,610.40x = 39,485.04 × 16,672.80
  4. Step 4: Simplify right side
    28,610.40x = 658,326,174.91
  5. Step 5: Solve for x
    x = 658,326,174.91/28,610.40
  6. Step 6: Final answer
    x = 23,010.03

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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.