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Finding the Fourth Proportional to 28,518, 39,354.84 and 17,340

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Solution

The fourth proportional to 28,518, 39,354.84 and 17,340 is: 23,929.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518 : 39,354.84 = 17,340 : x
  2. Step 2: Convert to fraction form
    28,518/39,354.84 = 17,340/x
  3. Step 3: Cross multiply
    28,518x = 39,354.84 × 17,340
  4. Step 4: Simplify right side
    28,518x = 682,412,925.60
  5. Step 5: Solve for x
    x = 682,412,925.60/28,518
  6. Step 6: Final answer
    x = 23,929.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.