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Finding the Fourth Proportional to 13,661.41, 20,443.35 and 9,917.53

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Solution

The fourth proportional to 13,661.41, 20,443.35 and 9,917.53 is: 14,840.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.41 : 20,443.35 = 9,917.53 : x
  2. Step 2: Convert to fraction form
    13,661.41/20,443.35 = 9,917.53/x
  3. Step 3: Cross multiply
    13,661.41x = 20,443.35 × 9,917.53
  4. Step 4: Simplify right side
    13,661.41x = 202,747,536.93
  5. Step 5: Solve for x
    x = 202,747,536.93/13,661.41
  6. Step 6: Final answer
    x = 14,840.89

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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.