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Finding the Fourth Proportional to 8,992.64, 13,490.40 and 3,149.12

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Solution

The fourth proportional to 8,992.64, 13,490.40 and 3,149.12 is: 4,724.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,992.64 : 13,490.40 = 3,149.12 : x
  2. Step 2: Convert to fraction form
    8,992.64/13,490.40 = 3,149.12/x
  3. Step 3: Cross multiply
    8,992.64x = 13,490.40 × 3,149.12
  4. Step 4: Simplify right side
    8,992.64x = 42,482,888.45
  5. Step 5: Solve for x
    x = 42,482,888.45/8,992.64
  6. Step 6: Final answer
    x = 4,724.18

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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.