Home / 20,968.98-28,936.94-15,615.37

Finding the Fourth Proportional to 20,968.98, 28,936.94 and 15,615.37

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Solution

The fourth proportional to 20,968.98, 28,936.94 and 15,615.37 is: 21,549.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.98 : 28,936.94 = 15,615.37 : x
  2. Step 2: Convert to fraction form
    20,968.98/28,936.94 = 15,615.37/x
  3. Step 3: Cross multiply
    20,968.98x = 28,936.94 × 15,615.37
  4. Step 4: Simplify right side
    20,968.98x = 451,861,024.77
  5. Step 5: Solve for x
    x = 451,861,024.77/20,968.98
  6. Step 6: Final answer
    x = 21,549.02

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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.