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Finding the Fourth Proportional to 28,247.79, 38,969.61 and 17,489.79

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Solution

The fourth proportional to 28,247.79, 38,969.61 and 17,489.79 is: 24,128.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,247.79 : 38,969.61 = 17,489.79 : x
  2. Step 2: Convert to fraction form
    28,247.79/38,969.61 = 17,489.79/x
  3. Step 3: Cross multiply
    28,247.79x = 38,969.61 × 17,489.79
  4. Step 4: Simplify right side
    28,247.79x = 681,570,295.28
  5. Step 5: Solve for x
    x = 681,570,295.28/28,247.79
  6. Step 6: Final answer
    x = 24,128.27

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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.