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Finding the Fourth Proportional to 18,810.52, 28,078.43 and 17,440

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Solution

The fourth proportional to 18,810.52, 28,078.43 and 17,440 is: 26,032.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.52 : 28,078.43 = 17,440 : x
  2. Step 2: Convert to fraction form
    18,810.52/28,078.43 = 17,440/x
  3. Step 3: Cross multiply
    18,810.52x = 28,078.43 × 17,440
  4. Step 4: Simplify right side
    18,810.52x = 489,687,819.20
  5. Step 5: Solve for x
    x = 489,687,819.20/18,810.52
  6. Step 6: Final answer
    x = 26,032.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.