Home / 21,281.36-31,927.80-7,431.44

Finding the Fourth Proportional to 21,281.36, 31,927.80 and 7,431.44

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Solution

The fourth proportional to 21,281.36, 31,927.80 and 7,431.44 is: 11,149.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.36 : 31,927.80 = 7,431.44 : x
  2. Step 2: Convert to fraction form
    21,281.36/31,927.80 = 7,431.44/x
  3. Step 3: Cross multiply
    21,281.36x = 31,927.80 × 7,431.44
  4. Step 4: Simplify right side
    21,281.36x = 237,269,530.03
  5. Step 5: Solve for x
    x = 237,269,530.03/21,281.36
  6. Step 6: Final answer
    x = 11,149.17

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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.