Home / 20,138.16-30,207.40-6,287.60

Finding the Fourth Proportional to 20,138.16, 30,207.40 and 6,287.60

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Solution

The fourth proportional to 20,138.16, 30,207.40 and 6,287.60 is: 9,431.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.16 : 30,207.40 = 6,287.60 : x
  2. Step 2: Convert to fraction form
    20,138.16/30,207.40 = 6,287.60/x
  3. Step 3: Cross multiply
    20,138.16x = 30,207.40 × 6,287.60
  4. Step 4: Simplify right side
    20,138.16x = 189,932,048.24
  5. Step 5: Solve for x
    x = 189,932,048.24/20,138.16
  6. Step 6: Final answer
    x = 9,431.45

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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.