Home / 20,078.09-27,707.01-11,580.57

Finding the Fourth Proportional to 20,078.09, 27,707.01 and 11,580.57

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Solution

The fourth proportional to 20,078.09, 27,707.01 and 11,580.57 is: 15,980.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.09 : 27,707.01 = 11,580.57 : x
  2. Step 2: Convert to fraction form
    20,078.09/27,707.01 = 11,580.57/x
  3. Step 3: Cross multiply
    20,078.09x = 27,707.01 × 11,580.57
  4. Step 4: Simplify right side
    20,078.09x = 320,862,830.26
  5. Step 5: Solve for x
    x = 320,862,830.26/20,078.09
  6. Step 6: Final answer
    x = 15,980.75

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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.