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Finding the Fourth Proportional to 8,648.72, 12,964.96 and 7,878.36

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Solution

The fourth proportional to 8,648.72, 12,964.96 and 7,878.36 is: 11,810.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,648.72 : 12,964.96 = 7,878.36 : x
  2. Step 2: Convert to fraction form
    8,648.72/12,964.96 = 7,878.36/x
  3. Step 3: Cross multiply
    8,648.72x = 12,964.96 × 7,878.36
  4. Step 4: Simplify right side
    8,648.72x = 102,142,680.73
  5. Step 5: Solve for x
    x = 102,142,680.73/8,648.72
  6. Step 6: Final answer
    x = 11,810.14

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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.