Home / 20,570.92-28,388.00-11,139.48

Finding the Fourth Proportional to 20,570.92, 28,388.00 and 11,139.48

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Solution

The fourth proportional to 20,570.92, 28,388.00 and 11,139.48 is: 15,372.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.92 : 28,388.00 = 11,139.48 : x
  2. Step 2: Convert to fraction form
    20,570.92/28,388.00 = 11,139.48/x
  3. Step 3: Cross multiply
    20,570.92x = 28,388.00 × 11,139.48
  4. Step 4: Simplify right side
    20,570.92x = 316,227,586.09
  5. Step 5: Solve for x
    x = 316,227,586.09/20,570.92
  6. Step 6: Final answer
    x = 15,372.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.