Home / 20,187.43-27,856.33-11,689.72

Finding the Fourth Proportional to 20,187.43, 27,856.33 and 11,689.72

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Solution

The fourth proportional to 20,187.43, 27,856.33 and 11,689.72 is: 16,130.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.43 : 27,856.33 = 11,689.72 : x
  2. Step 2: Convert to fraction form
    20,187.43/27,856.33 = 11,689.72/x
  3. Step 3: Cross multiply
    20,187.43x = 27,856.33 × 11,689.72
  4. Step 4: Simplify right side
    20,187.43x = 325,632,697.93
  5. Step 5: Solve for x
    x = 325,632,697.93/20,187.43
  6. Step 6: Final answer
    x = 16,130.47

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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.