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Finding the Fourth Proportional to 13,046.70, 18,005.34 and 7,381.45

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Solution

The fourth proportional to 13,046.70, 18,005.34 and 7,381.45 is: 10,186.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,046.70 : 18,005.34 = 7,381.45 : x
  2. Step 2: Convert to fraction form
    13,046.70/18,005.34 = 7,381.45/x
  3. Step 3: Cross multiply
    13,046.70x = 18,005.34 × 7,381.45
  4. Step 4: Simplify right side
    13,046.70x = 132,905,424.33
  5. Step 5: Solve for x
    x = 132,905,424.33/13,046.70
  6. Step 6: Final answer
    x = 10,186.90

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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.