Home / 21,331.39-31,983.37-8,860.01

Finding the Fourth Proportional to 21,331.39, 31,983.37 and 8,860.01

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Solution

The fourth proportional to 21,331.39, 31,983.37 and 8,860.01 is: 13,284.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.39 : 31,983.37 = 8,860.01 : x
  2. Step 2: Convert to fraction form
    21,331.39/31,983.37 = 8,860.01/x
  3. Step 3: Cross multiply
    21,331.39x = 31,983.37 × 8,860.01
  4. Step 4: Simplify right side
    21,331.39x = 283,372,978.03
  5. Step 5: Solve for x
    x = 283,372,978.03/21,331.39
  6. Step 6: Final answer
    x = 13,284.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.