Home / 20,406.77-28,161.39-11,332.14

Finding the Fourth Proportional to 20,406.77, 28,161.39 and 11,332.14

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Solution

The fourth proportional to 20,406.77, 28,161.39 and 11,332.14 is: 15,638.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.77 : 28,161.39 = 11,332.14 : x
  2. Step 2: Convert to fraction form
    20,406.77/28,161.39 = 11,332.14/x
  3. Step 3: Cross multiply
    20,406.77x = 28,161.39 × 11,332.14
  4. Step 4: Simplify right side
    20,406.77x = 319,128,687.22
  5. Step 5: Solve for x
    x = 319,128,687.22/20,406.77
  6. Step 6: Final answer
    x = 15,638.37

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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.