Home / 12,915.20-19,369.44-4,145.60

Finding the Fourth Proportional to 12,915.20, 19,369.44 and 4,145.60

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Solution

The fourth proportional to 12,915.20, 19,369.44 and 4,145.60 is: 6,217.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.20 : 19,369.44 = 4,145.60 : x
  2. Step 2: Convert to fraction form
    12,915.20/19,369.44 = 4,145.60/x
  3. Step 3: Cross multiply
    12,915.20x = 19,369.44 × 4,145.60
  4. Step 4: Simplify right side
    12,915.20x = 80,297,950.46
  5. Step 5: Solve for x
    x = 80,297,950.46/12,915.20
  6. Step 6: Final answer
    x = 6,217.32

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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.