Home / 20,365.22-28,107.81-11,869.13

Finding the Fourth Proportional to 20,365.22, 28,107.81 and 11,869.13

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Solution

The fourth proportional to 20,365.22, 28,107.81 and 11,869.13 is: 16,381.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,365.22 : 28,107.81 = 11,869.13 : x
  2. Step 2: Convert to fraction form
    20,365.22/28,107.81 = 11,869.13/x
  3. Step 3: Cross multiply
    20,365.22x = 28,107.81 × 11,869.13
  4. Step 4: Simplify right side
    20,365.22x = 333,615,321.17
  5. Step 5: Solve for x
    x = 333,615,321.17/20,365.22
  6. Step 6: Final answer
    x = 16,381.62

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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.