Home / 20,742.81-28,623.95-11,789.07

Finding the Fourth Proportional to 20,742.81, 28,623.95 and 11,789.07

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Solution

The fourth proportional to 20,742.81, 28,623.95 and 11,789.07 is: 16,268.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.81 : 28,623.95 = 11,789.07 : x
  2. Step 2: Convert to fraction form
    20,742.81/28,623.95 = 11,789.07/x
  3. Step 3: Cross multiply
    20,742.81x = 28,623.95 × 11,789.07
  4. Step 4: Simplify right side
    20,742.81x = 337,449,548.16
  5. Step 5: Solve for x
    x = 337,449,548.16/20,742.81
  6. Step 6: Final answer
    x = 16,268.27

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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.