Home / 5,145.20-7,717.80-1,682.45

Finding the Fourth Proportional to 5,145.20, 7,717.80 and 1,682.45

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Solution

The fourth proportional to 5,145.20, 7,717.80 and 1,682.45 is: 2,523.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.20 : 7,717.80 = 1,682.45 : x
  2. Step 2: Convert to fraction form
    5,145.20/7,717.80 = 1,682.45/x
  3. Step 3: Cross multiply
    5,145.20x = 7,717.80 × 1,682.45
  4. Step 4: Simplify right side
    5,145.20x = 12,984,812.61
  5. Step 5: Solve for x
    x = 12,984,812.61/5,145.20
  6. Step 6: Final answer
    x = 2,523.68

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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.