Home / 14,278.38-19,704.21-7,990.74

Finding the Fourth Proportional to 14,278.38, 19,704.21 and 7,990.74

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Solution

The fourth proportional to 14,278.38, 19,704.21 and 7,990.74 is: 11,027.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,278.38 : 19,704.21 = 7,990.74 : x
  2. Step 2: Convert to fraction form
    14,278.38/19,704.21 = 7,990.74/x
  3. Step 3: Cross multiply
    14,278.38x = 19,704.21 × 7,990.74
  4. Step 4: Simplify right side
    14,278.38x = 157,451,219.02
  5. Step 5: Solve for x
    x = 157,451,219.02/14,278.38
  6. Step 6: Final answer
    x = 11,027.25

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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.