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Finding the Fourth Proportional to 18,916.46, 28,372.68 and 8,386.67

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Solution

The fourth proportional to 18,916.46, 28,372.68 and 8,386.67 is: 12,579.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.46 : 28,372.68 = 8,386.67 : x
  2. Step 2: Convert to fraction form
    18,916.46/28,372.68 = 8,386.67/x
  3. Step 3: Cross multiply
    18,916.46x = 28,372.68 × 8,386.67
  4. Step 4: Simplify right side
    18,916.46x = 237,952,162.31
  5. Step 5: Solve for x
    x = 237,952,162.31/18,916.46
  6. Step 6: Final answer
    x = 12,579.11

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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.