Home / 21,273.90-31,911.12-6,485.28

Finding the Fourth Proportional to 21,273.90, 31,911.12 and 6,485.28

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Solution

The fourth proportional to 21,273.90, 31,911.12 and 6,485.28 is: 9,728.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.90 : 31,911.12 = 6,485.28 : x
  2. Step 2: Convert to fraction form
    21,273.90/31,911.12 = 6,485.28/x
  3. Step 3: Cross multiply
    21,273.90x = 31,911.12 × 6,485.28
  4. Step 4: Simplify right side
    21,273.90x = 206,952,548.31
  5. Step 5: Solve for x
    x = 206,952,548.31/21,273.90
  6. Step 6: Final answer
    x = 9,728.00

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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.