Home / 20,570.43-30,849.26-7,421.09

Finding the Fourth Proportional to 20,570.43, 30,849.26 and 7,421.09

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Solution

The fourth proportional to 20,570.43, 30,849.26 and 7,421.09 is: 11,129.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.43 : 30,849.26 = 7,421.09 : x
  2. Step 2: Convert to fraction form
    20,570.43/30,849.26 = 7,421.09/x
  3. Step 3: Cross multiply
    20,570.43x = 30,849.26 × 7,421.09
  4. Step 4: Simplify right side
    20,570.43x = 228,935,134.89
  5. Step 5: Solve for x
    x = 228,935,134.89/20,570.43
  6. Step 6: Final answer
    x = 11,129.33

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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.