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Finding the Fourth Proportional to 8,968.74, 12,376.83 and 4,989.84

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Solution

The fourth proportional to 8,968.74, 12,376.83 and 4,989.84 is: 6,885.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,968.74 : 12,376.83 = 4,989.84 : x
  2. Step 2: Convert to fraction form
    8,968.74/12,376.83 = 4,989.84/x
  3. Step 3: Cross multiply
    8,968.74x = 12,376.83 × 4,989.84
  4. Step 4: Simplify right side
    8,968.74x = 61,758,401.41
  5. Step 5: Solve for x
    x = 61,758,401.41/8,968.74
  6. Step 6: Final answer
    x = 6,885.96

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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.