Home / 20,500.35-30,749.31-7,172.40

Finding the Fourth Proportional to 20,500.35, 30,749.31 and 7,172.40

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Solution

The fourth proportional to 20,500.35, 30,749.31 and 7,172.40 is: 10,758.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500.35 : 30,749.31 = 7,172.40 : x
  2. Step 2: Convert to fraction form
    20,500.35/30,749.31 = 7,172.40/x
  3. Step 3: Cross multiply
    20,500.35x = 30,749.31 × 7,172.40
  4. Step 4: Simplify right side
    20,500.35x = 220,546,351.04
  5. Step 5: Solve for x
    x = 220,546,351.04/20,500.35
  6. Step 6: Final answer
    x = 10,758.17

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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.