Home / 14,420.40-19,896.75-8,131.56

Finding the Fourth Proportional to 14,420.40, 19,896.75 and 8,131.56

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Solution

The fourth proportional to 14,420.40, 19,896.75 and 8,131.56 is: 11,219.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,420.40 : 19,896.75 = 8,131.56 : x
  2. Step 2: Convert to fraction form
    14,420.40/19,896.75 = 8,131.56/x
  3. Step 3: Cross multiply
    14,420.40x = 19,896.75 × 8,131.56
  4. Step 4: Simplify right side
    14,420.40x = 161,791,616.43
  5. Step 5: Solve for x
    x = 161,791,616.43/14,420.40
  6. Step 6: Final answer
    x = 11,219.63

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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.