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Finding the Fourth Proportional to 20,626.56, 30,916.80 and 18,965.88

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Solution

The fourth proportional to 20,626.56, 30,916.80 and 18,965.88 is: 28,427.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,626.56 : 30,916.80 = 18,965.88 : x
  2. Step 2: Convert to fraction form
    20,626.56/30,916.80 = 18,965.88/x
  3. Step 3: Cross multiply
    20,626.56x = 30,916.80 × 18,965.88
  4. Step 4: Simplify right side
    20,626.56x = 586,364,318.78
  5. Step 5: Solve for x
    x = 586,364,318.78/20,626.56
  6. Step 6: Final answer
    x = 28,427.63

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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.