Home / 25,858.22-38,786.55-7,139.40

Finding the Fourth Proportional to 25,858.22, 38,786.55 and 7,139.40

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Solution

The fourth proportional to 25,858.22, 38,786.55 and 7,139.40 is: 10,708.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,858.22 : 38,786.55 = 7,139.40 : x
  2. Step 2: Convert to fraction form
    25,858.22/38,786.55 = 7,139.40/x
  3. Step 3: Cross multiply
    25,858.22x = 38,786.55 × 7,139.40
  4. Step 4: Simplify right side
    25,858.22x = 276,912,483.29
  5. Step 5: Solve for x
    x = 276,912,483.29/25,858.22
  6. Step 6: Final answer
    x = 10,708.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.