Home / 20,968.72-28,936.57-15,615.10

Finding the Fourth Proportional to 20,968.72, 28,936.57 and 15,615.10

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Solution

The fourth proportional to 20,968.72, 28,936.57 and 15,615.10 is: 21,548.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.72 : 28,936.57 = 15,615.10 : x
  2. Step 2: Convert to fraction form
    20,968.72/28,936.57 = 15,615.10/x
  3. Step 3: Cross multiply
    20,968.72x = 28,936.57 × 15,615.10
  4. Step 4: Simplify right side
    20,968.72x = 451,847,434.21
  5. Step 5: Solve for x
    x = 451,847,434.21/20,968.72
  6. Step 6: Final answer
    x = 21,548.64

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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.