Home / 13,941.78-19,231.21-8,272.80

Finding the Fourth Proportional to 13,941.78, 19,231.21 and 8,272.80

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Solution

The fourth proportional to 13,941.78, 19,231.21 and 8,272.80 is: 11,411.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,941.78 : 19,231.21 = 8,272.80 : x
  2. Step 2: Convert to fraction form
    13,941.78/19,231.21 = 8,272.80/x
  3. Step 3: Cross multiply
    13,941.78x = 19,231.21 × 8,272.80
  4. Step 4: Simplify right side
    13,941.78x = 159,095,954.09
  5. Step 5: Solve for x
    x = 159,095,954.09/13,941.78
  6. Step 6: Final answer
    x = 11,411.45

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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.