Home / 20,836.51-28,754.39-11,405.07

Finding the Fourth Proportional to 20,836.51, 28,754.39 and 11,405.07

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Solution

The fourth proportional to 20,836.51, 28,754.39 and 11,405.07 is: 15,739.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.51 : 28,754.39 = 11,405.07 : x
  2. Step 2: Convert to fraction form
    20,836.51/28,754.39 = 11,405.07/x
  3. Step 3: Cross multiply
    20,836.51x = 28,754.39 × 11,405.07
  4. Step 4: Simplify right side
    20,836.51x = 327,945,859.27
  5. Step 5: Solve for x
    x = 327,945,859.27/20,836.51
  6. Step 6: Final answer
    x = 15,739.00

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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.