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Finding the Fourth Proportional to 13,624.72, 18,810.72 and 8,916.96

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Solution

The fourth proportional to 13,624.72, 18,810.72 and 8,916.96 is: 12,311.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,624.72 : 18,810.72 = 8,916.96 : x
  2. Step 2: Convert to fraction form
    13,624.72/18,810.72 = 8,916.96/x
  3. Step 3: Cross multiply
    13,624.72x = 18,810.72 × 8,916.96
  4. Step 4: Simplify right side
    13,624.72x = 167,734,437.81
  5. Step 5: Solve for x
    x = 167,734,437.81/13,624.72
  6. Step 6: Final answer
    x = 12,311.04

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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.