Home / 15,128.39-20,877.54-8,414.30

Finding the Fourth Proportional to 15,128.39, 20,877.54 and 8,414.30

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Solution

The fourth proportional to 15,128.39, 20,877.54 and 8,414.30 is: 11,611.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.39 : 20,877.54 = 8,414.30 : x
  2. Step 2: Convert to fraction form
    15,128.39/20,877.54 = 8,414.30/x
  3. Step 3: Cross multiply
    15,128.39x = 20,877.54 × 8,414.30
  4. Step 4: Simplify right side
    15,128.39x = 175,669,884.82
  5. Step 5: Solve for x
    x = 175,669,884.82/15,128.39
  6. Step 6: Final answer
    x = 11,611.94

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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.