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Finding the Fourth Proportional to 8,491.80, 11,719.43 and 4,715.70

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Solution

The fourth proportional to 8,491.80, 11,719.43 and 4,715.70 is: 6,508.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.80 : 11,719.43 = 4,715.70 : x
  2. Step 2: Convert to fraction form
    8,491.80/11,719.43 = 4,715.70/x
  3. Step 3: Cross multiply
    8,491.80x = 11,719.43 × 4,715.70
  4. Step 4: Simplify right side
    8,491.80x = 55,265,292.47
  5. Step 5: Solve for x
    x = 55,265,292.47/8,491.80
  6. Step 6: Final answer
    x = 6,508.08

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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.