Home / 20,661.42-28,512.16-11,709.75

Finding the Fourth Proportional to 20,661.42, 28,512.16 and 11,709.75

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Solution

The fourth proportional to 20,661.42, 28,512.16 and 11,709.75 is: 16,159.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.42 : 28,512.16 = 11,709.75 : x
  2. Step 2: Convert to fraction form
    20,661.42/28,512.16 = 11,709.75/x
  3. Step 3: Cross multiply
    20,661.42x = 28,512.16 × 11,709.75
  4. Step 4: Simplify right side
    20,661.42x = 333,870,207.01
  5. Step 5: Solve for x
    x = 333,870,207.01/20,661.42
  6. Step 6: Final answer
    x = 16,159.11

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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.