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Finding the Fourth Proportional to 13,412.70, 18,508.50 and 7,744.86

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Solution

The fourth proportional to 13,412.70, 18,508.50 and 7,744.86 is: 10,687.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,412.70 : 18,508.50 = 7,744.86 : x
  2. Step 2: Convert to fraction form
    13,412.70/18,508.50 = 7,744.86/x
  3. Step 3: Cross multiply
    13,412.70x = 18,508.50 × 7,744.86
  4. Step 4: Simplify right side
    13,412.70x = 143,345,741.31
  5. Step 5: Solve for x
    x = 143,345,741.31/13,412.70
  6. Step 6: Final answer
    x = 10,687.31

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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.