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Finding the Fourth Proportional to 12,485.76, 18,704.72 and 9,349.76

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Solution

The fourth proportional to 12,485.76, 18,704.72 and 9,349.76 is: 14,006.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.76 : 18,704.72 = 9,349.76 : x
  2. Step 2: Convert to fraction form
    12,485.76/18,704.72 = 9,349.76/x
  3. Step 3: Cross multiply
    12,485.76x = 18,704.72 × 9,349.76
  4. Step 4: Simplify right side
    12,485.76x = 174,884,642.87
  5. Step 5: Solve for x
    x = 174,884,642.87/12,485.76
  6. Step 6: Final answer
    x = 14,006.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.