Home / 12,613.12-18,920.28-5,585.56

Finding the Fourth Proportional to 12,613.12, 18,920.28 and 5,585.56

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Solution

The fourth proportional to 12,613.12, 18,920.28 and 5,585.56 is: 8,378.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,613.12 : 18,920.28 = 5,585.56 : x
  2. Step 2: Convert to fraction form
    12,613.12/18,920.28 = 5,585.56/x
  3. Step 3: Cross multiply
    12,613.12x = 18,920.28 × 5,585.56
  4. Step 4: Simplify right side
    12,613.12x = 105,680,332.80
  5. Step 5: Solve for x
    x = 105,680,332.80/12,613.12
  6. Step 6: Final answer
    x = 8,378.61

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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.