Home / 20,685.42-28,546.50-11,254.62

Finding the Fourth Proportional to 20,685.42, 28,546.50 and 11,254.62

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Solution

The fourth proportional to 20,685.42, 28,546.50 and 11,254.62 is: 15,531.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.42 : 28,546.50 = 11,254.62 : x
  2. Step 2: Convert to fraction form
    20,685.42/28,546.50 = 11,254.62/x
  3. Step 3: Cross multiply
    20,685.42x = 28,546.50 × 11,254.62
  4. Step 4: Simplify right side
    20,685.42x = 321,280,009.83
  5. Step 5: Solve for x
    x = 321,280,009.83/20,685.42
  6. Step 6: Final answer
    x = 15,531.71

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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.