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Finding the Fourth Proportional to 8,481.81, 11,710.74 and 6,488.90

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Solution

The fourth proportional to 8,481.81, 11,710.74 and 6,488.90 is: 8,959.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,481.81 : 11,710.74 = 6,488.90 : x
  2. Step 2: Convert to fraction form
    8,481.81/11,710.74 = 6,488.90/x
  3. Step 3: Cross multiply
    8,481.81x = 11,710.74 × 6,488.90
  4. Step 4: Simplify right side
    8,481.81x = 75,989,762.23
  5. Step 5: Solve for x
    x = 75,989,762.23/8,481.81
  6. Step 6: Final answer
    x = 8,959.14

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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.