Home / 21,274.20-31,908.87-8,126.28

Finding the Fourth Proportional to 21,274.20, 31,908.87 and 8,126.28

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Solution

The fourth proportional to 21,274.20, 31,908.87 and 8,126.28 is: 12,188.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.20 : 31,908.87 = 8,126.28 : x
  2. Step 2: Convert to fraction form
    21,274.20/31,908.87 = 8,126.28/x
  3. Step 3: Cross multiply
    21,274.20x = 31,908.87 × 8,126.28
  4. Step 4: Simplify right side
    21,274.20x = 259,300,412.10
  5. Step 5: Solve for x
    x = 259,300,412.10/21,274.20
  6. Step 6: Final answer
    x = 12,188.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.