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Finding the Fourth Proportional to 18,753.03, 28,128.78 and 4,713.15

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Solution

The fourth proportional to 18,753.03, 28,128.78 and 4,713.15 is: 7,069.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.03 : 28,128.78 = 4,713.15 : x
  2. Step 2: Convert to fraction form
    18,753.03/28,128.78 = 4,713.15/x
  3. Step 3: Cross multiply
    18,753.03x = 28,128.78 × 4,713.15
  4. Step 4: Simplify right side
    18,753.03x = 132,575,159.46
  5. Step 5: Solve for x
    x = 132,575,159.46/18,753.03
  6. Step 6: Final answer
    x = 7,069.53

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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.