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Finding the Fourth Proportional to 18,905.76, 28,340.28 and 9,042.48

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Solution

The fourth proportional to 18,905.76, 28,340.28 and 9,042.48 is: 13,554.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.76 : 28,340.28 = 9,042.48 : x
  2. Step 2: Convert to fraction form
    18,905.76/28,340.28 = 9,042.48/x
  3. Step 3: Cross multiply
    18,905.76x = 28,340.28 × 9,042.48
  4. Step 4: Simplify right side
    18,905.76x = 256,266,415.09
  5. Step 5: Solve for x
    x = 256,266,415.09/18,905.76
  6. Step 6: Final answer
    x = 13,554.94

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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.