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Finding the Fourth Proportional to 20,585.46, 28,406.46 and 12,087.93

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Solution

The fourth proportional to 20,585.46, 28,406.46 and 12,087.93 is: 16,680.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.46 : 28,406.46 = 12,087.93 : x
  2. Step 2: Convert to fraction form
    20,585.46/28,406.46 = 12,087.93/x
  3. Step 3: Cross multiply
    20,585.46x = 28,406.46 × 12,087.93
  4. Step 4: Simplify right side
    20,585.46x = 343,375,300.03
  5. Step 5: Solve for x
    x = 343,375,300.03/20,585.46
  6. Step 6: Final answer
    x = 16,680.48

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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.