Home / 20,659.50-28,516.86-12,161.52

Finding the Fourth Proportional to 20,659.50, 28,516.86 and 12,161.52

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Solution

The fourth proportional to 20,659.50, 28,516.86 and 12,161.52 is: 16,786.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.50 : 28,516.86 = 12,161.52 : x
  2. Step 2: Convert to fraction form
    20,659.50/28,516.86 = 12,161.52/x
  3. Step 3: Cross multiply
    20,659.50x = 28,516.86 × 12,161.52
  4. Step 4: Simplify right side
    20,659.50x = 346,808,363.23
  5. Step 5: Solve for x
    x = 346,808,363.23/20,659.50
  6. Step 6: Final answer
    x = 16,786.87

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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.