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Finding the Fourth Proportional to 11,975.52, 16,528.08 and 9,138.06

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Solution

The fourth proportional to 11,975.52, 16,528.08 and 9,138.06 is: 12,611.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,975.52 : 16,528.08 = 9,138.06 : x
  2. Step 2: Convert to fraction form
    11,975.52/16,528.08 = 9,138.06/x
  3. Step 3: Cross multiply
    11,975.52x = 16,528.08 × 9,138.06
  4. Step 4: Simplify right side
    11,975.52x = 151,034,586.72
  5. Step 5: Solve for x
    x = 151,034,586.72/11,975.52
  6. Step 6: Final answer
    x = 12,611.94

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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.