Home / 20,421.48-30,624.66-7,270.32

Finding the Fourth Proportional to 20,421.48, 30,624.66 and 7,270.32

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Solution

The fourth proportional to 20,421.48, 30,624.66 and 7,270.32 is: 10,902.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.48 : 30,624.66 = 7,270.32 : x
  2. Step 2: Convert to fraction form
    20,421.48/30,624.66 = 7,270.32/x
  3. Step 3: Cross multiply
    20,421.48x = 30,624.66 × 7,270.32
  4. Step 4: Simplify right side
    20,421.48x = 222,651,078.09
  5. Step 5: Solve for x
    x = 222,651,078.09/20,421.48
  6. Step 6: Final answer
    x = 10,902.79

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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.