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Finding the Fourth Proportional to 28,940.80, 43,425.60 and 11,411.20

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Solution

The fourth proportional to 28,940.80, 43,425.60 and 11,411.20 is: 17,122.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,940.80 : 43,425.60 = 11,411.20 : x
  2. Step 2: Convert to fraction form
    28,940.80/43,425.60 = 11,411.20/x
  3. Step 3: Cross multiply
    28,940.80x = 43,425.60 × 11,411.20
  4. Step 4: Simplify right side
    28,940.80x = 495,538,206.72
  5. Step 5: Solve for x
    x = 495,538,206.72/28,940.80
  6. Step 6: Final answer
    x = 17,122.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.