Home / 28,274.89-39,021.11-15,699.73

Finding the Fourth Proportional to 28,274.89, 39,021.11 and 15,699.73

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Solution

The fourth proportional to 28,274.89, 39,021.11 and 15,699.73 is: 21,666.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,274.89 : 39,021.11 = 15,699.73 : x
  2. Step 2: Convert to fraction form
    28,274.89/39,021.11 = 15,699.73/x
  3. Step 3: Cross multiply
    28,274.89x = 39,021.11 × 15,699.73
  4. Step 4: Simplify right side
    28,274.89x = 612,620,812.80
  5. Step 5: Solve for x
    x = 612,620,812.80/28,274.89
  6. Step 6: Final answer
    x = 21,666.60

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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.