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Finding the Fourth Proportional to 13,580.73, 18,741.44 and 7,915.05

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Solution

The fourth proportional to 13,580.73, 18,741.44 and 7,915.05 is: 10,922.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,580.73 : 18,741.44 = 7,915.05 : x
  2. Step 2: Convert to fraction form
    13,580.73/18,741.44 = 7,915.05/x
  3. Step 3: Cross multiply
    13,580.73x = 18,741.44 × 7,915.05
  4. Step 4: Simplify right side
    13,580.73x = 148,339,454.46
  5. Step 5: Solve for x
    x = 148,339,454.46/13,580.73
  6. Step 6: Final answer
    x = 10,922.79

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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.