Home / 20,078.09-27,707.40-11,125.56

Finding the Fourth Proportional to 20,078.09, 27,707.40 and 11,125.56

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Solution

The fourth proportional to 20,078.09, 27,707.40 and 11,125.56 is: 15,353.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.09 : 27,707.40 = 11,125.56 : x
  2. Step 2: Convert to fraction form
    20,078.09/27,707.40 = 11,125.56/x
  3. Step 3: Cross multiply
    20,078.09x = 27,707.40 × 11,125.56
  4. Step 4: Simplify right side
    20,078.09x = 308,260,341.14
  5. Step 5: Solve for x
    x = 308,260,341.14/20,078.09
  6. Step 6: Final answer
    x = 15,353.07

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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.