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Finding the Fourth Proportional to 8,899.44, 12,281.16 and 4,920.72

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Solution

The fourth proportional to 8,899.44, 12,281.16 and 4,920.72 is: 6,790.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,899.44 : 12,281.16 = 4,920.72 : x
  2. Step 2: Convert to fraction form
    8,899.44/12,281.16 = 4,920.72/x
  3. Step 3: Cross multiply
    8,899.44x = 12,281.16 × 4,920.72
  4. Step 4: Simplify right side
    8,899.44x = 60,432,149.64
  5. Step 5: Solve for x
    x = 60,432,149.64/8,899.44
  6. Step 6: Final answer
    x = 6,790.56

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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.