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Finding the Fourth Proportional to 8,491.68, 11,718.42 and 4,715.40

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Solution

The fourth proportional to 8,491.68, 11,718.42 and 4,715.40 is: 6,507.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,491.68 : 11,718.42 = 4,715.40 : x
  2. Step 2: Convert to fraction form
    8,491.68/11,718.42 = 4,715.40/x
  3. Step 3: Cross multiply
    8,491.68x = 11,718.42 × 4,715.40
  4. Step 4: Simplify right side
    8,491.68x = 55,257,037.67
  5. Step 5: Solve for x
    x = 55,257,037.67/8,491.68
  6. Step 6: Final answer
    x = 6,507.20

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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.