Home / 20,081.43-27,711.90-11,128.74

Finding the Fourth Proportional to 20,081.43, 27,711.90 and 11,128.74

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Solution

The fourth proportional to 20,081.43, 27,711.90 and 11,128.74 is: 15,357.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.43 : 27,711.90 = 11,128.74 : x
  2. Step 2: Convert to fraction form
    20,081.43/27,711.90 = 11,128.74/x
  3. Step 3: Cross multiply
    20,081.43x = 27,711.90 × 11,128.74
  4. Step 4: Simplify right side
    20,081.43x = 308,398,457.18
  5. Step 5: Solve for x
    x = 308,398,457.18/20,081.43
  6. Step 6: Final answer
    x = 15,357.40

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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.