Home / 30,129.12-41,613.12-28,379.52

Finding the Fourth Proportional to 30,129.12, 41,613.12 and 28,379.52

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Solution

The fourth proportional to 30,129.12, 41,613.12 and 28,379.52 is: 39,196.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,129.12 : 41,613.12 = 28,379.52 : x
  2. Step 2: Convert to fraction form
    30,129.12/41,613.12 = 28,379.52/x
  3. Step 3: Cross multiply
    30,129.12x = 41,613.12 × 28,379.52
  4. Step 4: Simplify right side
    30,129.12x = 1,180,960,371.30
  5. Step 5: Solve for x
    x = 1,180,960,371.30/30,129.12
  6. Step 6: Final answer
    x = 39,196.64

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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.