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Finding the Fourth Proportional to 18,918, 28,373.76 and 5,063.76

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Solution

The fourth proportional to 18,918, 28,373.76 and 5,063.76 is: 7,594.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918 : 28,373.76 = 5,063.76 : x
  2. Step 2: Convert to fraction form
    18,918/28,373.76 = 5,063.76/x
  3. Step 3: Cross multiply
    18,918x = 28,373.76 × 5,063.76
  4. Step 4: Simplify right side
    18,918x = 143,677,910.94
  5. Step 5: Solve for x
    x = 143,677,910.94/18,918
  6. Step 6: Final answer
    x = 7,594.77

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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.