Home / 27,991.90-38,636.76-18,438.76

Finding the Fourth Proportional to 27,991.90, 38,636.76 and 18,438.76

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Solution

The fourth proportional to 27,991.90, 38,636.76 and 18,438.76 is: 25,450.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,991.90 : 38,636.76 = 18,438.76 : x
  2. Step 2: Convert to fraction form
    27,991.90/38,636.76 = 18,438.76/x
  3. Step 3: Cross multiply
    27,991.90x = 38,636.76 × 18,438.76
  4. Step 4: Simplify right side
    27,991.90x = 712,413,944.82
  5. Step 5: Solve for x
    x = 712,413,944.82/27,991.90
  6. Step 6: Final answer
    x = 25,450.72

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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.