Home / 15,142.20-20,896.83-9,170.49

Finding the Fourth Proportional to 15,142.20, 20,896.83 and 9,170.49

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Solution

The fourth proportional to 15,142.20, 20,896.83 and 9,170.49 is: 12,655.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,142.20 : 20,896.83 = 9,170.49 : x
  2. Step 2: Convert to fraction form
    15,142.20/20,896.83 = 9,170.49/x
  3. Step 3: Cross multiply
    15,142.20x = 20,896.83 × 9,170.49
  4. Step 4: Simplify right side
    15,142.20x = 191,634,170.55
  5. Step 5: Solve for x
    x = 191,634,170.55/15,142.20
  6. Step 6: Final answer
    x = 12,655.64

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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.