Home / 12,915.64-19,348.08-8,519.68

Finding the Fourth Proportional to 12,915.64, 19,348.08 and 8,519.68

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Solution

The fourth proportional to 12,915.64, 19,348.08 and 8,519.68 is: 12,762.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.64 : 19,348.08 = 8,519.68 : x
  2. Step 2: Convert to fraction form
    12,915.64/19,348.08 = 8,519.68/x
  3. Step 3: Cross multiply
    12,915.64x = 19,348.08 × 8,519.68
  4. Step 4: Simplify right side
    12,915.64x = 164,839,450.21
  5. Step 5: Solve for x
    x = 164,839,450.21/12,915.64
  6. Step 6: Final answer
    x = 12,762.78

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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.