Home / 20,685.81-28,546.71-11,254.38

Finding the Fourth Proportional to 20,685.81, 28,546.71 and 11,254.38

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Solution

The fourth proportional to 20,685.81, 28,546.71 and 11,254.38 is: 15,531.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.81 : 28,546.71 = 11,254.38 : x
  2. Step 2: Convert to fraction form
    20,685.81/28,546.71 = 11,254.38/x
  3. Step 3: Cross multiply
    20,685.81x = 28,546.71 × 11,254.38
  4. Step 4: Simplify right side
    20,685.81x = 321,275,522.09
  5. Step 5: Solve for x
    x = 321,275,522.09/20,685.81
  6. Step 6: Final answer
    x = 15,531.20

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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.