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Finding the Fourth Proportional to 8,466.40, 12,699.06 and 2,919.88

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Solution

The fourth proportional to 8,466.40, 12,699.06 and 2,919.88 is: 4,379.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,466.40 : 12,699.06 = 2,919.88 : x
  2. Step 2: Convert to fraction form
    8,466.40/12,699.06 = 2,919.88/x
  3. Step 3: Cross multiply
    8,466.40x = 12,699.06 × 2,919.88
  4. Step 4: Simplify right side
    8,466.40x = 37,079,731.31
  5. Step 5: Solve for x
    x = 37,079,731.31/8,466.40
  6. Step 6: Final answer
    x = 4,379.63

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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.