Home / 20,168.76-30,188.40-10,785.32

Finding the Fourth Proportional to 20,168.76, 30,188.40 and 10,785.32

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Solution

The fourth proportional to 20,168.76, 30,188.40 and 10,785.32 is: 16,143.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,168.76 : 30,188.40 = 10,785.32 : x
  2. Step 2: Convert to fraction form
    20,168.76/30,188.40 = 10,785.32/x
  3. Step 3: Cross multiply
    20,168.76x = 30,188.40 × 10,785.32
  4. Step 4: Simplify right side
    20,168.76x = 325,591,554.29
  5. Step 5: Solve for x
    x = 325,591,554.29/20,168.76
  6. Step 6: Final answer
    x = 16,143.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.