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Finding the Fourth Proportional to 28,189.06, 42,290.08 and 8,468

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Solution

The fourth proportional to 28,189.06, 42,290.08 and 8,468 is: 12,703.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.06 : 42,290.08 = 8,468 : x
  2. Step 2: Convert to fraction form
    28,189.06/42,290.08 = 8,468/x
  3. Step 3: Cross multiply
    28,189.06x = 42,290.08 × 8,468
  4. Step 4: Simplify right side
    28,189.06x = 358,112,397.44
  5. Step 5: Solve for x
    x = 358,112,397.44/28,189.06
  6. Step 6: Final answer
    x = 12,703.95

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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.