Home / 18,438.89-25,439.10-10,881.44

Finding the Fourth Proportional to 18,438.89, 25,439.10 and 10,881.44

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Solution

The fourth proportional to 18,438.89, 25,439.10 and 10,881.44 is: 15,012.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.89 : 25,439.10 = 10,881.44 : x
  2. Step 2: Convert to fraction form
    18,438.89/25,439.10 = 10,881.44/x
  3. Step 3: Cross multiply
    18,438.89x = 25,439.10 × 10,881.44
  4. Step 4: Simplify right side
    18,438.89x = 276,814,003.91
  5. Step 5: Solve for x
    x = 276,814,003.91/18,438.89
  6. Step 6: Final answer
    x = 15,012.51

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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.