Home / 21,287.88-31,927.50-5,705.64

Finding the Fourth Proportional to 21,287.88, 31,927.50 and 5,705.64

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Solution

The fourth proportional to 21,287.88, 31,927.50 and 5,705.64 is: 8,557.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.88 : 31,927.50 = 5,705.64 : x
  2. Step 2: Convert to fraction form
    21,287.88/31,927.50 = 5,705.64/x
  3. Step 3: Cross multiply
    21,287.88x = 31,927.50 × 5,705.64
  4. Step 4: Simplify right side
    21,287.88x = 182,166,821.10
  5. Step 5: Solve for x
    x = 182,166,821.10/21,287.88
  6. Step 6: Final answer
    x = 8,557.30

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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.