Home / 20,078.16-27,705.89-11,581.07

Finding the Fourth Proportional to 20,078.16, 27,705.89 and 11,581.07

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Solution

The fourth proportional to 20,078.16, 27,705.89 and 11,581.07 is: 15,980.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.16 : 27,705.89 = 11,581.07 : x
  2. Step 2: Convert to fraction form
    20,078.16/27,705.89 = 11,581.07/x
  3. Step 3: Cross multiply
    20,078.16x = 27,705.89 × 11,581.07
  4. Step 4: Simplify right side
    20,078.16x = 320,863,655.07
  5. Step 5: Solve for x
    x = 320,863,655.07/20,078.16
  6. Step 6: Final answer
    x = 15,980.73

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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.