Home / 21,187.36-31,742.31-9,922.03

Finding the Fourth Proportional to 21,187.36, 31,742.31 and 9,922.03

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Solution

The fourth proportional to 21,187.36, 31,742.31 and 9,922.03 is: 14,864.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.36 : 31,742.31 = 9,922.03 : x
  2. Step 2: Convert to fraction form
    21,187.36/31,742.31 = 9,922.03/x
  3. Step 3: Cross multiply
    21,187.36x = 31,742.31 × 9,922.03
  4. Step 4: Simplify right side
    21,187.36x = 314,948,026.22
  5. Step 5: Solve for x
    x = 314,948,026.22/21,187.36
  6. Step 6: Final answer
    x = 14,864.90

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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.