Home / 20,142.32-30,210.36-10,288.88

Finding the Fourth Proportional to 20,142.32, 30,210.36 and 10,288.88

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Solution

The fourth proportional to 20,142.32, 30,210.36 and 10,288.88 is: 15,431.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.32 : 30,210.36 = 10,288.88 : x
  2. Step 2: Convert to fraction form
    20,142.32/30,210.36 = 10,288.88/x
  3. Step 3: Cross multiply
    20,142.32x = 30,210.36 × 10,288.88
  4. Step 4: Simplify right side
    20,142.32x = 310,830,768.80
  5. Step 5: Solve for x
    x = 310,830,768.80/20,142.32
  6. Step 6: Final answer
    x = 15,431.73

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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.