Home / 5,428.40-8,142.45-1,730.85

Finding the Fourth Proportional to 5,428.40, 8,142.45 and 1,730.85

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Solution

The fourth proportional to 5,428.40, 8,142.45 and 1,730.85 is: 2,596.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.40 : 8,142.45 = 1,730.85 : x
  2. Step 2: Convert to fraction form
    5,428.40/8,142.45 = 1,730.85/x
  3. Step 3: Cross multiply
    5,428.40x = 8,142.45 × 1,730.85
  4. Step 4: Simplify right side
    5,428.40x = 14,093,359.58
  5. Step 5: Solve for x
    x = 14,093,359.58/5,428.40
  6. Step 6: Final answer
    x = 2,596.23

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1.5x scale

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.