Home / 20,828.71-28,743.63-11,397.27

Finding the Fourth Proportional to 20,828.71, 28,743.63 and 11,397.27

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Solution

The fourth proportional to 20,828.71, 28,743.63 and 11,397.27 is: 15,728.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.71 : 28,743.63 = 11,397.27 : x
  2. Step 2: Convert to fraction form
    20,828.71/28,743.63 = 11,397.27/x
  3. Step 3: Cross multiply
    20,828.71x = 28,743.63 × 11,397.27
  4. Step 4: Simplify right side
    20,828.71x = 327,598,951.84
  5. Step 5: Solve for x
    x = 327,598,951.84/20,828.71
  6. Step 6: Final answer
    x = 15,728.24

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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.