Home / 20,577.42-30,859.77-7,428.09

Finding the Fourth Proportional to 20,577.42, 30,859.77 and 7,428.09

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Solution

The fourth proportional to 20,577.42, 30,859.77 and 7,428.09 is: 11,139.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,577.42 : 30,859.77 = 7,428.09 : x
  2. Step 2: Convert to fraction form
    20,577.42/30,859.77 = 7,428.09/x
  3. Step 3: Cross multiply
    20,577.42x = 30,859.77 × 7,428.09
  4. Step 4: Simplify right side
    20,577.42x = 229,229,148.94
  5. Step 5: Solve for x
    x = 229,229,148.94/20,577.42
  6. Step 6: Final answer
    x = 11,139.84

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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.