Home / 21,242.88-31,858.56-8,928

Finding the Fourth Proportional to 21,242.88, 31,858.56 and 8,928

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Solution

The fourth proportional to 21,242.88, 31,858.56 and 8,928 is: 13,389.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,242.88 : 31,858.56 = 8,928 : x
  2. Step 2: Convert to fraction form
    21,242.88/31,858.56 = 8,928/x
  3. Step 3: Cross multiply
    21,242.88x = 31,858.56 × 8,928
  4. Step 4: Simplify right side
    21,242.88x = 284,433,223.68
  5. Step 5: Solve for x
    x = 284,433,223.68/21,242.88
  6. Step 6: Final answer
    x = 13,389.58

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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.