Home / 10,985.80-16,478.55-2,665.75

Finding the Fourth Proportional to 10,985.80, 16,478.55 and 2,665.75

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Solution

The fourth proportional to 10,985.80, 16,478.55 and 2,665.75 is: 3,998.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,985.80 : 16,478.55 = 2,665.75 : x
  2. Step 2: Convert to fraction form
    10,985.80/16,478.55 = 2,665.75/x
  3. Step 3: Cross multiply
    10,985.80x = 16,478.55 × 2,665.75
  4. Step 4: Simplify right side
    10,985.80x = 43,927,694.66
  5. Step 5: Solve for x
    x = 43,927,694.66/10,985.80
  6. Step 6: Final answer
    x = 3,998.59

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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.