Home / 20,078.06-27,711.58-11,585.64

Finding the Fourth Proportional to 20,078.06, 27,711.58 and 11,585.64

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Solution

The fourth proportional to 20,078.06, 27,711.58 and 11,585.64 is: 15,990.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.06 : 27,711.58 = 11,585.64 : x
  2. Step 2: Convert to fraction form
    20,078.06/27,711.58 = 11,585.64/x
  3. Step 3: Cross multiply
    20,078.06x = 27,711.58 × 11,585.64
  4. Step 4: Simplify right side
    20,078.06x = 321,056,389.71
  5. Step 5: Solve for x
    x = 321,056,389.71/20,078.06
  6. Step 6: Final answer
    x = 15,990.41

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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.