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Finding the Fourth Proportional to 8,490.48, 12,735.90 and 2,647.14

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Solution

The fourth proportional to 8,490.48, 12,735.90 and 2,647.14 is: 3,970.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.48 : 12,735.90 = 2,647.14 : x
  2. Step 2: Convert to fraction form
    8,490.48/12,735.90 = 2,647.14/x
  3. Step 3: Cross multiply
    8,490.48x = 12,735.90 × 2,647.14
  4. Step 4: Simplify right side
    8,490.48x = 33,713,710.33
  5. Step 5: Solve for x
    x = 33,713,710.33/8,490.48
  6. Step 6: Final answer
    x = 3,970.77

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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.