Home / 20,336.21-28,074.14-12,786.71

Finding the Fourth Proportional to 20,336.21, 28,074.14 and 12,786.71

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Solution

The fourth proportional to 20,336.21, 28,074.14 and 12,786.71 is: 17,652.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,336.21 : 28,074.14 = 12,786.71 : x
  2. Step 2: Convert to fraction form
    20,336.21/28,074.14 = 12,786.71/x
  3. Step 3: Cross multiply
    20,336.21x = 28,074.14 × 12,786.71
  4. Step 4: Simplify right side
    20,336.21x = 358,975,960.17
  5. Step 5: Solve for x
    x = 358,975,960.17/20,336.21
  6. Step 6: Final answer
    x = 17,652.05

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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.