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Finding the Fourth Proportional to 13,423.76, 18,526.44 and 7,836.56

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Solution

The fourth proportional to 13,423.76, 18,526.44 and 7,836.56 is: 10,815.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.76 : 18,526.44 = 7,836.56 : x
  2. Step 2: Convert to fraction form
    13,423.76/18,526.44 = 7,836.56/x
  3. Step 3: Cross multiply
    13,423.76x = 18,526.44 × 7,836.56
  4. Step 4: Simplify right side
    13,423.76x = 145,183,558.65
  5. Step 5: Solve for x
    x = 145,183,558.65/13,423.76
  6. Step 6: Final answer
    x = 10,815.42

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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.