Home / 10,639.80-15,959.70-2,742.30

Finding the Fourth Proportional to 10,639.80, 15,959.70 and 2,742.30

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Solution

The fourth proportional to 10,639.80, 15,959.70 and 2,742.30 is: 4,113.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639.80 : 15,959.70 = 2,742.30 : x
  2. Step 2: Convert to fraction form
    10,639.80/15,959.70 = 2,742.30/x
  3. Step 3: Cross multiply
    10,639.80x = 15,959.70 × 2,742.30
  4. Step 4: Simplify right side
    10,639.80x = 43,766,285.31
  5. Step 5: Solve for x
    x = 43,766,285.31/10,639.80
  6. Step 6: Final answer
    x = 4,113.45

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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.