Home / 12,898.72-19,348.09-8,515.15

Finding the Fourth Proportional to 12,898.72, 19,348.09 and 8,515.15

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Solution

The fourth proportional to 12,898.72, 19,348.09 and 8,515.15 is: 12,772.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,898.72 : 19,348.09 = 8,515.15 : x
  2. Step 2: Convert to fraction form
    12,898.72/19,348.09 = 8,515.15/x
  3. Step 3: Cross multiply
    12,898.72x = 19,348.09 × 8,515.15
  4. Step 4: Simplify right side
    12,898.72x = 164,751,888.56
  5. Step 5: Solve for x
    x = 164,751,888.56/12,898.72
  6. Step 6: Final answer
    x = 12,772.73

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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.