Home / 20,287.12-30,430.74-7,132.36

Finding the Fourth Proportional to 20,287.12, 30,430.74 and 7,132.36

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Solution

The fourth proportional to 20,287.12, 30,430.74 and 7,132.36 is: 10,698.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.12 : 30,430.74 = 7,132.36 : x
  2. Step 2: Convert to fraction form
    20,287.12/30,430.74 = 7,132.36/x
  3. Step 3: Cross multiply
    20,287.12x = 30,430.74 × 7,132.36
  4. Step 4: Simplify right side
    20,287.12x = 217,042,992.75
  5. Step 5: Solve for x
    x = 217,042,992.75/20,287.12
  6. Step 6: Final answer
    x = 10,698.56

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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.