Home / 11,915.49-17,878.14-4,129.77

Finding the Fourth Proportional to 11,915.49, 17,878.14 and 4,129.77

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Solution

The fourth proportional to 11,915.49, 17,878.14 and 4,129.77 is: 6,196.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,915.49 : 17,878.14 = 4,129.77 : x
  2. Step 2: Convert to fraction form
    11,915.49/17,878.14 = 4,129.77/x
  3. Step 3: Cross multiply
    11,915.49x = 17,878.14 × 4,129.77
  4. Step 4: Simplify right side
    11,915.49x = 73,832,606.23
  5. Step 5: Solve for x
    x = 73,832,606.23/11,915.49
  6. Step 6: Final answer
    x = 6,196.36

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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.