Home / 14,278.36-19,704.09-7,990.72

Finding the Fourth Proportional to 14,278.36, 19,704.09 and 7,990.72

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Solution

The fourth proportional to 14,278.36, 19,704.09 and 7,990.72 is: 11,027.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,278.36 : 19,704.09 = 7,990.72 : x
  2. Step 2: Convert to fraction form
    14,278.36/19,704.09 = 7,990.72/x
  3. Step 3: Cross multiply
    14,278.36x = 19,704.09 × 7,990.72
  4. Step 4: Simplify right side
    14,278.36x = 157,449,866.04
  5. Step 5: Solve for x
    x = 157,449,866.04/14,278.36
  6. Step 6: Final answer
    x = 11,027.17

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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.