Home / 20,865.96-28,794.18-12,487.08

Finding the Fourth Proportional to 20,865.96, 28,794.18 and 12,487.08

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Solution

The fourth proportional to 20,865.96, 28,794.18 and 12,487.08 is: 17,231.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.96 : 28,794.18 = 12,487.08 : x
  2. Step 2: Convert to fraction form
    20,865.96/28,794.18 = 12,487.08/x
  3. Step 3: Cross multiply
    20,865.96x = 28,794.18 × 12,487.08
  4. Step 4: Simplify right side
    20,865.96x = 359,555,229.19
  5. Step 5: Solve for x
    x = 359,555,229.19/20,865.96
  6. Step 6: Final answer
    x = 17,231.66

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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.