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Finding the Fourth Proportional to 13,393.86, 18,473.71 and 9,620.91

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Solution

The fourth proportional to 13,393.86, 18,473.71 and 9,620.91 is: 13,269.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,393.86 : 18,473.71 = 9,620.91 : x
  2. Step 2: Convert to fraction form
    13,393.86/18,473.71 = 9,620.91/x
  3. Step 3: Cross multiply
    13,393.86x = 18,473.71 × 9,620.91
  4. Step 4: Simplify right side
    13,393.86x = 177,733,901.28
  5. Step 5: Solve for x
    x = 177,733,901.28/13,393.86
  6. Step 6: Final answer
    x = 13,269.80

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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.