Home / 13,919.72-19,212.90-8,611.52

Finding the Fourth Proportional to 13,919.72, 19,212.90 and 8,611.52

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Solution

The fourth proportional to 13,919.72, 19,212.90 and 8,611.52 is: 11,886.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.72 : 19,212.90 = 8,611.52 : x
  2. Step 2: Convert to fraction form
    13,919.72/19,212.90 = 8,611.52/x
  3. Step 3: Cross multiply
    13,919.72x = 19,212.90 × 8,611.52
  4. Step 4: Simplify right side
    13,919.72x = 165,452,272.61
  5. Step 5: Solve for x
    x = 165,452,272.61/13,919.72
  6. Step 6: Final answer
    x = 11,886.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.