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Finding the Fourth Proportional to 18,693, 28,045.58 and 13,076.46

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Solution

The fourth proportional to 18,693, 28,045.58 and 13,076.46 is: 19,618.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693 : 28,045.58 = 13,076.46 : x
  2. Step 2: Convert to fraction form
    18,693/28,045.58 = 13,076.46/x
  3. Step 3: Cross multiply
    18,693x = 28,045.58 × 13,076.46
  4. Step 4: Simplify right side
    18,693x = 366,736,839.66
  5. Step 5: Solve for x
    x = 366,736,839.66/18,693
  6. Step 6: Final answer
    x = 19,618.94

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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.