Home / 20,439.94-30,668.55-8,758.66

Finding the Fourth Proportional to 20,439.94, 30,668.55 and 8,758.66

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Solution

The fourth proportional to 20,439.94, 30,668.55 and 8,758.66 is: 13,141.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.94 : 30,668.55 = 8,758.66 : x
  2. Step 2: Convert to fraction form
    20,439.94/30,668.55 = 8,758.66/x
  3. Step 3: Cross multiply
    20,439.94x = 30,668.55 × 8,758.66
  4. Step 4: Simplify right side
    20,439.94x = 268,615,402.14
  5. Step 5: Solve for x
    x = 268,615,402.14/20,439.94
  6. Step 6: Final answer
    x = 13,141.69

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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.