Home / 20,659.61-28,516.71-12,161.07

Finding the Fourth Proportional to 20,659.61, 28,516.71 and 12,161.07

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Solution

The fourth proportional to 20,659.61, 28,516.71 and 12,161.07 is: 16,786.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.61 : 28,516.71 = 12,161.07 : x
  2. Step 2: Convert to fraction form
    20,659.61/28,516.71 = 12,161.07/x
  3. Step 3: Cross multiply
    20,659.61x = 28,516.71 × 12,161.07
  4. Step 4: Simplify right side
    20,659.61x = 346,793,683.68
  5. Step 5: Solve for x
    x = 346,793,683.68/20,659.61
  6. Step 6: Final answer
    x = 16,786.07

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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.