Home / 20,080.76-27,711.04-11,128.19

Finding the Fourth Proportional to 20,080.76, 27,711.04 and 11,128.19

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Solution

The fourth proportional to 20,080.76, 27,711.04 and 11,128.19 is: 15,356.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.76 : 27,711.04 = 11,128.19 : x
  2. Step 2: Convert to fraction form
    20,080.76/27,711.04 = 11,128.19/x
  3. Step 3: Cross multiply
    20,080.76x = 27,711.04 × 11,128.19
  4. Step 4: Simplify right side
    20,080.76x = 308,373,541.41
  5. Step 5: Solve for x
    x = 308,373,541.41/20,080.76
  6. Step 6: Final answer
    x = 15,356.67

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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.