Home / 15,129.27-20,878.44-8,415.33

Finding the Fourth Proportional to 15,129.27, 20,878.44 and 8,415.33

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Solution

The fourth proportional to 15,129.27, 20,878.44 and 8,415.33 is: 11,613.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.27 : 20,878.44 = 8,415.33 : x
  2. Step 2: Convert to fraction form
    15,129.27/20,878.44 = 8,415.33/x
  3. Step 3: Cross multiply
    15,129.27x = 20,878.44 × 8,415.33
  4. Step 4: Simplify right side
    15,129.27x = 175,698,962.49
  5. Step 5: Solve for x
    x = 175,698,962.49/15,129.27
  6. Step 6: Final answer
    x = 11,613.18

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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.