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Finding the Fourth Proportional to 18,726.48, 28,072.36 and 7,047.44

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Solution

The fourth proportional to 18,726.48, 28,072.36 and 7,047.44 is: 10,564.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726.48 : 28,072.36 = 7,047.44 : x
  2. Step 2: Convert to fraction form
    18,726.48/28,072.36 = 7,047.44/x
  3. Step 3: Cross multiply
    18,726.48x = 28,072.36 × 7,047.44
  4. Step 4: Simplify right side
    18,726.48x = 197,838,272.76
  5. Step 5: Solve for x
    x = 197,838,272.76/18,726.48
  6. Step 6: Final answer
    x = 10,564.63

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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.