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Finding the Fourth Proportional to 8,987.87, 13,460.88 and 8,676.41

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Solution

The fourth proportional to 8,987.87, 13,460.88 and 8,676.41 is: 12,994.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.87 : 13,460.88 = 8,676.41 : x
  2. Step 2: Convert to fraction form
    8,987.87/13,460.88 = 8,676.41/x
  3. Step 3: Cross multiply
    8,987.87x = 13,460.88 × 8,676.41
  4. Step 4: Simplify right side
    8,987.87x = 116,792,113.84
  5. Step 5: Solve for x
    x = 116,792,113.84/8,987.87
  6. Step 6: Final answer
    x = 12,994.42

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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.