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Finding the Fourth Proportional to 8,139.42, 11,243.07 and 6,573.42

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Solution

The fourth proportional to 8,139.42, 11,243.07 and 6,573.42 is: 9,079.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.42 : 11,243.07 = 6,573.42 : x
  2. Step 2: Convert to fraction form
    8,139.42/11,243.07 = 6,573.42/x
  3. Step 3: Cross multiply
    8,139.42x = 11,243.07 × 6,573.42
  4. Step 4: Simplify right side
    8,139.42x = 73,905,421.20
  5. Step 5: Solve for x
    x = 73,905,421.20/8,139.42
  6. Step 6: Final answer
    x = 9,079.94

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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.