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Finding the Fourth Proportional to 15,103, 20,842.16 and 8,479

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Solution

The fourth proportional to 15,103, 20,842.16 and 8,479 is: 11,701.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,103 : 20,842.16 = 8,479 : x
  2. Step 2: Convert to fraction form
    15,103/20,842.16 = 8,479/x
  3. Step 3: Cross multiply
    15,103x = 20,842.16 × 8,479
  4. Step 4: Simplify right side
    15,103x = 176,720,674.64
  5. Step 5: Solve for x
    x = 176,720,674.64/15,103
  6. Step 6: Final answer
    x = 11,701.03

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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.