Home / 20,200.90-30,299.03-7,720.65

Finding the Fourth Proportional to 20,200.90, 30,299.03 and 7,720.65

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Solution

The fourth proportional to 20,200.90, 30,299.03 and 7,720.65 is: 11,580.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,200.90 : 30,299.03 = 7,720.65 : x
  2. Step 2: Convert to fraction form
    20,200.90/30,299.03 = 7,720.65/x
  3. Step 3: Cross multiply
    20,200.90x = 30,299.03 × 7,720.65
  4. Step 4: Simplify right side
    20,200.90x = 233,928,054.47
  5. Step 5: Solve for x
    x = 233,928,054.47/20,200.90
  6. Step 6: Final answer
    x = 11,580.08

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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.