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Finding the Fourth Proportional to 13,260.34, 18,299.34 and 7,291.90

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Solution

The fourth proportional to 13,260.34, 18,299.34 and 7,291.90 is: 10,062.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,260.34 : 18,299.34 = 7,291.90 : x
  2. Step 2: Convert to fraction form
    13,260.34/18,299.34 = 7,291.90/x
  3. Step 3: Cross multiply
    13,260.34x = 18,299.34 × 7,291.90
  4. Step 4: Simplify right side
    13,260.34x = 133,436,957.35
  5. Step 5: Solve for x
    x = 133,436,957.35/13,260.34
  6. Step 6: Final answer
    x = 10,062.86

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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.