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Finding the Fourth Proportional to 18,788.01, 28,186.92 and 8,260.11

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Solution

The fourth proportional to 18,788.01, 28,186.92 and 8,260.11 is: 12,392.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,788.01 : 28,186.92 = 8,260.11 : x
  2. Step 2: Convert to fraction form
    18,788.01/28,186.92 = 8,260.11/x
  3. Step 3: Cross multiply
    18,788.01x = 28,186.92 × 8,260.11
  4. Step 4: Simplify right side
    18,788.01x = 232,827,059.76
  5. Step 5: Solve for x
    x = 232,827,059.76/18,788.01
  6. Step 6: Final answer
    x = 12,392.32

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1.5x scale

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.