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Finding the Fourth Proportional to 8,590.33, 12,885.35 and 8,378.31

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Solution

The fourth proportional to 8,590.33, 12,885.35 and 8,378.31 is: 12,567.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.33 : 12,885.35 = 8,378.31 : x
  2. Step 2: Convert to fraction form
    8,590.33/12,885.35 = 8,378.31/x
  3. Step 3: Cross multiply
    8,590.33x = 12,885.35 × 8,378.31
  4. Step 4: Simplify right side
    8,590.33x = 107,957,497.64
  5. Step 5: Solve for x
    x = 107,957,497.64/8,590.33
  6. Step 6: Final answer
    x = 12,567.33

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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.