Home / 20,631.51-30,949.37-7,120.93

Finding the Fourth Proportional to 20,631.51, 30,949.37 and 7,120.93

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Solution

The fourth proportional to 20,631.51, 30,949.37 and 7,120.93 is: 10,682.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.51 : 30,949.37 = 7,120.93 : x
  2. Step 2: Convert to fraction form
    20,631.51/30,949.37 = 7,120.93/x
  3. Step 3: Cross multiply
    20,631.51x = 30,949.37 × 7,120.93
  4. Step 4: Simplify right side
    20,631.51x = 220,388,182.02
  5. Step 5: Solve for x
    x = 220,388,182.02/20,631.51
  6. Step 6: Final answer
    x = 10,682.11

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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.