Home / 20,078.71-27,707.87-11,581.18

Finding the Fourth Proportional to 20,078.71, 27,707.87 and 11,581.18

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Solution

The fourth proportional to 20,078.71, 27,707.87 and 11,581.18 is: 15,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.71 : 27,707.87 = 11,581.18 : x
  2. Step 2: Convert to fraction form
    20,078.71/27,707.87 = 11,581.18/x
  3. Step 3: Cross multiply
    20,078.71x = 27,707.87 × 11,581.18
  4. Step 4: Simplify right side
    20,078.71x = 320,889,829.89
  5. Step 5: Solve for x
    x = 320,889,829.89/20,078.71
  6. Step 6: Final answer
    x = 15,981.60

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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.