Home / 30,613.75-45,920.63-12,145.75

Finding the Fourth Proportional to 30,613.75, 45,920.63 and 12,145.75

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Solution

The fourth proportional to 30,613.75, 45,920.63 and 12,145.75 is: 18,218.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,613.75 : 45,920.63 = 12,145.75 : x
  2. Step 2: Convert to fraction form
    30,613.75/45,920.63 = 12,145.75/x
  3. Step 3: Cross multiply
    30,613.75x = 45,920.63 × 12,145.75
  4. Step 4: Simplify right side
    30,613.75x = 557,740,491.82
  5. Step 5: Solve for x
    x = 557,740,491.82/30,613.75
  6. Step 6: Final answer
    x = 18,218.63

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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.