Home / 12,915.46-19,368.51-5,520.43

Finding the Fourth Proportional to 12,915.46, 19,368.51 and 5,520.43

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Solution

The fourth proportional to 12,915.46, 19,368.51 and 5,520.43 is: 8,278.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.46 : 19,368.51 = 5,520.43 : x
  2. Step 2: Convert to fraction form
    12,915.46/19,368.51 = 5,520.43/x
  3. Step 3: Cross multiply
    12,915.46x = 19,368.51 × 5,520.43
  4. Step 4: Simplify right side
    12,915.46x = 106,922,503.66
  5. Step 5: Solve for x
    x = 106,922,503.66/12,915.46
  6. Step 6: Final answer
    x = 8,278.64

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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.