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Finding the Fourth Proportional to 13,375.64, 18,458.46 and 7,407.86

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Solution

The fourth proportional to 13,375.64, 18,458.46 and 7,407.86 is: 10,222.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,375.64 : 18,458.46 = 7,407.86 : x
  2. Step 2: Convert to fraction form
    13,375.64/18,458.46 = 7,407.86/x
  3. Step 3: Cross multiply
    13,375.64x = 18,458.46 × 7,407.86
  4. Step 4: Simplify right side
    13,375.64x = 136,737,687.50
  5. Step 5: Solve for x
    x = 136,737,687.50/13,375.64
  6. Step 6: Final answer
    x = 10,222.89

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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.