Home / 20,081.04-27,709.20-11,128.10

Finding the Fourth Proportional to 20,081.04, 27,709.20 and 11,128.10

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Solution

The fourth proportional to 20,081.04, 27,709.20 and 11,128.10 is: 15,355.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.04 : 27,709.20 = 11,128.10 : x
  2. Step 2: Convert to fraction form
    20,081.04/27,709.20 = 11,128.10/x
  3. Step 3: Cross multiply
    20,081.04x = 27,709.20 × 11,128.10
  4. Step 4: Simplify right side
    20,081.04x = 308,350,748.52
  5. Step 5: Solve for x
    x = 308,350,748.52/20,081.04
  6. Step 6: Final answer
    x = 15,355.32

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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.