Home / 12,915.81-19,371.44-3,553.57

Finding the Fourth Proportional to 12,915.81, 19,371.44 and 3,553.57

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Solution

The fourth proportional to 12,915.81, 19,371.44 and 3,553.57 is: 5,329.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.81 : 19,371.44 = 3,553.57 : x
  2. Step 2: Convert to fraction form
    12,915.81/19,371.44 = 3,553.57/x
  3. Step 3: Cross multiply
    12,915.81x = 19,371.44 × 3,553.57
  4. Step 4: Simplify right side
    12,915.81x = 68,837,653.42
  5. Step 5: Solve for x
    x = 68,837,653.42/12,915.81
  6. Step 6: Final answer
    x = 5,329.72

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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.