Home / 20,078.58-27,707.97-11,580.72

Finding the Fourth Proportional to 20,078.58, 27,707.97 and 11,580.72

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Solution

The fourth proportional to 20,078.58, 27,707.97 and 11,580.72 is: 15,981.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.58 : 27,707.97 = 11,580.72 : x
  2. Step 2: Convert to fraction form
    20,078.58/27,707.97 = 11,580.72/x
  3. Step 3: Cross multiply
    20,078.58x = 27,707.97 × 11,580.72
  4. Step 4: Simplify right side
    20,078.58x = 320,878,337.72
  5. Step 5: Solve for x
    x = 320,878,337.72/20,078.58
  6. Step 6: Final answer
    x = 15,981.12

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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.