Home / 20,225.20-30,351.45-7,077.68

Finding the Fourth Proportional to 20,225.20, 30,351.45 and 7,077.68

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Solution

The fourth proportional to 20,225.20, 30,351.45 and 7,077.68 is: 10,621.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,225.20 : 30,351.45 = 7,077.68 : x
  2. Step 2: Convert to fraction form
    20,225.20/30,351.45 = 7,077.68/x
  3. Step 3: Cross multiply
    20,225.20x = 30,351.45 × 7,077.68
  4. Step 4: Simplify right side
    20,225.20x = 214,817,850.64
  5. Step 5: Solve for x
    x = 214,817,850.64/20,225.20
  6. Step 6: Final answer
    x = 10,621.30

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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.