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Finding the Fourth Proportional to 18,748, 28,123.44 and 6,436

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Solution

The fourth proportional to 18,748, 28,123.44 and 6,436 is: 9,654.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,748 : 28,123.44 = 6,436 : x
  2. Step 2: Convert to fraction form
    18,748/28,123.44 = 6,436/x
  3. Step 3: Cross multiply
    18,748x = 28,123.44 × 6,436
  4. Step 4: Simplify right side
    18,748x = 181,002,459.84
  5. Step 5: Solve for x
    x = 181,002,459.84/18,748
  6. Step 6: Final answer
    x = 9,654.49

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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.