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Finding the Fourth Proportional to 13,339.30, 18,408.05 and 7,371.06

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Solution

The fourth proportional to 13,339.30, 18,408.05 and 7,371.06 is: 10,171.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.30 : 18,408.05 = 7,371.06 : x
  2. Step 2: Convert to fraction form
    13,339.30/18,408.05 = 7,371.06/x
  3. Step 3: Cross multiply
    13,339.30x = 18,408.05 × 7,371.06
  4. Step 4: Simplify right side
    13,339.30x = 135,686,881.86
  5. Step 5: Solve for x
    x = 135,686,881.86/13,339.30
  6. Step 6: Final answer
    x = 10,171.97

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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.