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Finding the Fourth Proportional to 18,776.55, 25,912.89 and 10,819.29

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Solution

The fourth proportional to 18,776.55, 25,912.89 and 10,819.29 is: 14,931.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776.55 : 25,912.89 = 10,819.29 : x
  2. Step 2: Convert to fraction form
    18,776.55/25,912.89 = 10,819.29/x
  3. Step 3: Cross multiply
    18,776.55x = 25,912.89 × 10,819.29
  4. Step 4: Simplify right side
    18,776.55x = 280,359,071.65
  5. Step 5: Solve for x
    x = 280,359,071.65/18,776.55
  6. Step 6: Final answer
    x = 14,931.34

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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.