Home / 11,491.56-15,857.20-6,455.40

Finding the Fourth Proportional to 11,491.56, 15,857.20 and 6,455.40

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Solution

The fourth proportional to 11,491.56, 15,857.20 and 6,455.40 is: 8,907.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,491.56 : 15,857.20 = 6,455.40 : x
  2. Step 2: Convert to fraction form
    11,491.56/15,857.20 = 6,455.40/x
  3. Step 3: Cross multiply
    11,491.56x = 15,857.20 × 6,455.40
  4. Step 4: Simplify right side
    11,491.56x = 102,364,568.88
  5. Step 5: Solve for x
    x = 102,364,568.88/11,491.56
  6. Step 6: Final answer
    x = 8,907.80

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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.