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Finding the Fourth Proportional to 8,491.81, 11,718.80 and 4,715.05

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Solution

The fourth proportional to 8,491.81, 11,718.80 and 4,715.05 is: 6,506.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.81 : 11,718.80 = 4,715.05 : x
  2. Step 2: Convert to fraction form
    8,491.81/11,718.80 = 4,715.05/x
  3. Step 3: Cross multiply
    8,491.81x = 11,718.80 × 4,715.05
  4. Step 4: Simplify right side
    8,491.81x = 55,254,727.94
  5. Step 5: Solve for x
    x = 55,254,727.94/8,491.81
  6. Step 6: Final answer
    x = 6,506.83

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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.