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Finding the Fourth Proportional to 8,486.52, 12,728.83 and 2,642.64

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Solution

The fourth proportional to 8,486.52, 12,728.83 and 2,642.64 is: 3,963.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.52 : 12,728.83 = 2,642.64 : x
  2. Step 2: Convert to fraction form
    8,486.52/12,728.83 = 2,642.64/x
  3. Step 3: Cross multiply
    8,486.52x = 12,728.83 × 2,642.64
  4. Step 4: Simplify right side
    8,486.52x = 33,637,715.31
  5. Step 5: Solve for x
    x = 33,637,715.31/8,486.52
  6. Step 6: Final answer
    x = 3,963.66

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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.