Home / 5,275.65-7,912.86-1,380.36

Finding the Fourth Proportional to 5,275.65, 7,912.86 and 1,380.36

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Solution

The fourth proportional to 5,275.65, 7,912.86 and 1,380.36 is: 2,070.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275.65 : 7,912.86 = 1,380.36 : x
  2. Step 2: Convert to fraction form
    5,275.65/7,912.86 = 1,380.36/x
  3. Step 3: Cross multiply
    5,275.65x = 7,912.86 × 1,380.36
  4. Step 4: Simplify right side
    5,275.65x = 10,922,595.43
  5. Step 5: Solve for x
    x = 10,922,595.43/5,275.65
  6. Step 6: Final answer
    x = 2,070.38

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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.