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Finding the Fourth Proportional to 8,515.82, 12,853.70 and 8,515.82

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Solution

The fourth proportional to 8,515.82, 12,853.70 and 8,515.82 is: 12,853.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.82 : 12,853.70 = 8,515.82 : x
  2. Step 2: Convert to fraction form
    8,515.82/12,853.70 = 8,515.82/x
  3. Step 3: Cross multiply
    8,515.82x = 12,853.70 × 8,515.82
  4. Step 4: Simplify right side
    8,515.82x = 109,459,752.56
  5. Step 5: Solve for x
    x = 109,459,752.56/8,515.82
  6. Step 6: Final answer
    x = 12,853.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.