Home / 21,040-31,560.24-5,456.68

Finding the Fourth Proportional to 21,040, 31,560.24 and 5,456.68

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Solution

The fourth proportional to 21,040, 31,560.24 and 5,456.68 is: 8,185.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,040 : 31,560.24 = 5,456.68 : x
  2. Step 2: Convert to fraction form
    21,040/31,560.24 = 5,456.68/x
  3. Step 3: Cross multiply
    21,040x = 31,560.24 × 5,456.68
  4. Step 4: Simplify right side
    21,040x = 172,214,130.40
  5. Step 5: Solve for x
    x = 172,214,130.40/21,040
  6. Step 6: Final answer
    x = 8,185.08

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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.