Home / 20,840.45-28,760.54-11,409.03

Finding the Fourth Proportional to 20,840.45, 28,760.54 and 11,409.03

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Solution

The fourth proportional to 20,840.45, 28,760.54 and 11,409.03 is: 15,744.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.45 : 28,760.54 = 11,409.03 : x
  2. Step 2: Convert to fraction form
    20,840.45/28,760.54 = 11,409.03/x
  3. Step 3: Cross multiply
    20,840.45x = 28,760.54 × 11,409.03
  4. Step 4: Simplify right side
    20,840.45x = 328,129,806.63
  5. Step 5: Solve for x
    x = 328,129,806.63/20,840.45
  6. Step 6: Final answer
    x = 15,744.86

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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.