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Finding the Fourth Proportional to 13,558, 18,708.96 and 7,589.38

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Solution

The fourth proportional to 13,558, 18,708.96 and 7,589.38 is: 10,472.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,558 : 18,708.96 = 7,589.38 : x
  2. Step 2: Convert to fraction form
    13,558/18,708.96 = 7,589.38/x
  3. Step 3: Cross multiply
    13,558x = 18,708.96 × 7,589.38
  4. Step 4: Simplify right side
    13,558x = 141,989,406.84
  5. Step 5: Solve for x
    x = 141,989,406.84/13,558
  6. Step 6: Final answer
    x = 10,472.74

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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.