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Finding the Fourth Proportional to 18,790.53, 28,191.20 and 8,916.23

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Solution

The fourth proportional to 18,790.53, 28,191.20 and 8,916.23 is: 13,376.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,790.53 : 28,191.20 = 8,916.23 : x
  2. Step 2: Convert to fraction form
    18,790.53/28,191.20 = 8,916.23/x
  3. Step 3: Cross multiply
    18,790.53x = 28,191.20 × 8,916.23
  4. Step 4: Simplify right side
    18,790.53x = 251,359,037.64
  5. Step 5: Solve for x
    x = 251,359,037.64/18,790.53
  6. Step 6: Final answer
    x = 13,376.90

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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.