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Finding the Fourth Proportional to 15,181.71, 20,942.80 and 12,352.25

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Solution

The fourth proportional to 15,181.71, 20,942.80 and 12,352.25 is: 17,039.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,181.71 : 20,942.80 = 12,352.25 : x
  2. Step 2: Convert to fraction form
    15,181.71/20,942.80 = 12,352.25/x
  3. Step 3: Cross multiply
    15,181.71x = 20,942.80 × 12,352.25
  4. Step 4: Simplify right side
    15,181.71x = 258,690,534.82
  5. Step 5: Solve for x
    x = 258,690,534.82/15,181.71
  6. Step 6: Final answer
    x = 17,039.62

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1.5x scale

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.