Home / 20,377.28-28,120.73-11,885.28

Finding the Fourth Proportional to 20,377.28, 28,120.73 and 11,885.28

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Solution

The fourth proportional to 20,377.28, 28,120.73 and 11,885.28 is: 16,401.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.28 : 28,120.73 = 11,885.28 : x
  2. Step 2: Convert to fraction form
    20,377.28/28,120.73 = 11,885.28/x
  3. Step 3: Cross multiply
    20,377.28x = 28,120.73 × 11,885.28
  4. Step 4: Simplify right side
    20,377.28x = 334,222,690.43
  5. Step 5: Solve for x
    x = 334,222,690.43/20,377.28
  6. Step 6: Final answer
    x = 16,401.74

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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.