Home / 20,636.32-28,479.88-11,685.40

Finding the Fourth Proportional to 20,636.32, 28,479.88 and 11,685.40

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Solution

The fourth proportional to 20,636.32, 28,479.88 and 11,685.40 is: 16,126.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.32 : 28,479.88 = 11,685.40 : x
  2. Step 2: Convert to fraction form
    20,636.32/28,479.88 = 11,685.40/x
  3. Step 3: Cross multiply
    20,636.32x = 28,479.88 × 11,685.40
  4. Step 4: Simplify right side
    20,636.32x = 332,798,789.75
  5. Step 5: Solve for x
    x = 332,798,789.75/20,636.32
  6. Step 6: Final answer
    x = 16,126.85

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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.