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Finding the Fourth Proportional to 8,860.90, 13,291.37 and 8,319.62

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Solution

The fourth proportional to 8,860.90, 13,291.37 and 8,319.62 is: 12,479.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,860.90 : 13,291.37 = 8,319.62 : x
  2. Step 2: Convert to fraction form
    8,860.90/13,291.37 = 8,319.62/x
  3. Step 3: Cross multiply
    8,860.90x = 13,291.37 × 8,319.62
  4. Step 4: Simplify right side
    8,860.90x = 110,579,147.68
  5. Step 5: Solve for x
    x = 110,579,147.68/8,860.90
  6. Step 6: Final answer
    x = 12,479.45

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Similar ratio
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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.