Home / 5,382.81-7,428.90-3,145.25

Finding the Fourth Proportional to 5,382.81, 7,428.90 and 3,145.25

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Solution

The fourth proportional to 5,382.81, 7,428.90 and 3,145.25 is: 4,340.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,382.81 : 7,428.90 = 3,145.25 : x
  2. Step 2: Convert to fraction form
    5,382.81/7,428.90 = 3,145.25/x
  3. Step 3: Cross multiply
    5,382.81x = 7,428.90 × 3,145.25
  4. Step 4: Simplify right side
    5,382.81x = 23,365,710.58
  5. Step 5: Solve for x
    x = 23,365,710.58/5,382.81
  6. Step 6: Final answer
    x = 4,340.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.