Home / 6,315.87-8,715.92-3,521.55

Finding the Fourth Proportional to 6,315.87, 8,715.92 and 3,521.55

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Solution

The fourth proportional to 6,315.87, 8,715.92 and 3,521.55 is: 4,859.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,315.87 : 8,715.92 = 3,521.55 : x
  2. Step 2: Convert to fraction form
    6,315.87/8,715.92 = 3,521.55/x
  3. Step 3: Cross multiply
    6,315.87x = 8,715.92 × 3,521.55
  4. Step 4: Simplify right side
    6,315.87x = 30,693,530.47
  5. Step 5: Solve for x
    x = 30,693,530.47/6,315.87
  6. Step 6: Final answer
    x = 4,859.75

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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.