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Finding the Fourth Proportional to 10,790.88, 14,899.86 and 8,439.72

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Solution

The fourth proportional to 10,790.88, 14,899.86 and 8,439.72 is: 11,653.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,790.88 : 14,899.86 = 8,439.72 : x
  2. Step 2: Convert to fraction form
    10,790.88/14,899.86 = 8,439.72/x
  3. Step 3: Cross multiply
    10,790.88x = 14,899.86 × 8,439.72
  4. Step 4: Simplify right side
    10,790.88x = 125,750,646.44
  5. Step 5: Solve for x
    x = 125,750,646.44/10,790.88
  6. Step 6: Final answer
    x = 11,653.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.