Home / 20,887.36-28,822.56-11,812.24

Finding the Fourth Proportional to 20,887.36, 28,822.56 and 11,812.24

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Solution

The fourth proportional to 20,887.36, 28,822.56 and 11,812.24 is: 16,299.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.36 : 28,822.56 = 11,812.24 : x
  2. Step 2: Convert to fraction form
    20,887.36/28,822.56 = 11,812.24/x
  3. Step 3: Cross multiply
    20,887.36x = 28,822.56 × 11,812.24
  4. Step 4: Simplify right side
    20,887.36x = 340,458,996.13
  5. Step 5: Solve for x
    x = 340,458,996.13/20,887.36
  6. Step 6: Final answer
    x = 16,299.76

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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.