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Finding the Fourth Proportional to 8,718.72, 13,082.64 and 4,772.82

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Solution

The fourth proportional to 8,718.72, 13,082.64 and 4,772.82 is: 7,161.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.72 : 13,082.64 = 4,772.82 : x
  2. Step 2: Convert to fraction form
    8,718.72/13,082.64 = 4,772.82/x
  3. Step 3: Cross multiply
    8,718.72x = 13,082.64 × 4,772.82
  4. Step 4: Simplify right side
    8,718.72x = 62,441,085.84
  5. Step 5: Solve for x
    x = 62,441,085.84/8,718.72
  6. Step 6: Final answer
    x = 7,161.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.